diff --git a/slog/benchmarks/slog-pc.bench b/slog/benchmarks/slog-pc.bench
index 2787585..078e75f 100644
--- a/slog/benchmarks/slog-pc.bench
+++ b/slog/benchmarks/slog-pc.bench
@@ -2,105 +2,105 @@
 goarch: amd64
 pkg: golang.org/x/exp/slog/benchmarks
 cpu: Intel(R) Xeon(R) CPU @ 2.20GHz
-BenchmarkAttrs/disabled/5_args-8  	100000000	        11.01 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args-8  	100000000	        10.98 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args-8  	100000000	        11.06 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args-8  	100000000	        10.94 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args-8  	100000000	        10.96 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args_ctx-8         	99092853	        11.01 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args_ctx-8         	100000000	        11.25 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args_ctx-8         	100000000	        11.02 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args_ctx-8         	100000000	        11.12 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args_ctx-8         	92644926	        11.11 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/10_args-8            	56434416	        19.35 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/10_args-8            	61031977	        19.12 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/10_args-8            	61348626	        20.74 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/10_args-8            	61096641	        19.15 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/10_args-8            	60736203	        19.10 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/40_args-8            	18585967	        64.48 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/40_args-8            	18430046	        64.39 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/40_args-8            	18544654	        64.53 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/40_args-8            	18481387	        64.64 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/40_args-8            	18459106	        64.40 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args-8        	 3042543	       395.5 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args-8        	 2997498	       403.4 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args-8        	 3029053	       395.5 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args-8        	 2922511	       395.0 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args-8        	 3040330	       394.7 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args_ctx-8    	 3034948	       409.1 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args_ctx-8    	 3025192	       396.0 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args_ctx-8    	 3051126	       395.9 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args_ctx-8    	 3020608	       396.3 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args_ctx-8    	 3033238	       395.5 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/10_args-8       	 1702170	       704.5 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/10_args-8       	 1683478	       701.1 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/10_args-8       	 1668967	       705.1 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/10_args-8       	 1664659	       711.6 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/10_args-8       	 1710505	       712.6 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/40_args-8       	  536484	      2360 ns/op	    1408 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/40_args-8       	  515458	      2392 ns/op	    1408 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/40_args-8       	  536326	      2361 ns/op	    1408 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/40_args-8       	  524487	      2394 ns/op	    1408 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/40_args-8       	  526851	      2385 ns/op	    1408 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/5_args-8     	 2493134	       476.9 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args-8     	 2480722	       483.7 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args-8     	 2464448	       485.8 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args-8     	 2462064	       488.8 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args-8     	 2435934	       479.5 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 2467768	       486.2 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 2481487	       487.1 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 2473843	       499.9 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 2462508	       487.9 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 2468150	       482.7 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/10_args-8    	 1286020	       926.2 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/10_args-8    	 1288137	       952.8 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/10_args-8    	 1281404	       934.2 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/10_args-8    	 1271204	       944.3 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/10_args-8    	 1295236	       929.1 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/40_args-8    	  360975	      3248 ns/op	    1412 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/40_args-8    	  349827	      3260 ns/op	    1413 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/40_args-8    	  373995	      3306 ns/op	    1413 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/40_args-8    	  345276	      3219 ns/op	    1412 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/40_args-8    	  374112	      3284 ns/op	    1413 B/op	       1 allocs/op
-BenchmarkAttrs/Text_discard/5_args-8         	 1000000	      1067 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args-8         	 1000000	      1066 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args-8         	 1000000	      1080 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args-8         	  988404	      1087 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args-8         	 1000000	      1041 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1000000	      1113 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1000000	      1089 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1000000	      1142 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1000000	      1115 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args_ctx-8     	  971776	      1096 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/10_args-8        	  743016	      1713 ns/op	     224 B/op	       5 allocs/op
-BenchmarkAttrs/Text_discard/10_args-8        	  688854	      1740 ns/op	     224 B/op	       5 allocs/op
-BenchmarkAttrs/Text_discard/10_args-8        	  708565	      1762 ns/op	     224 B/op	       5 allocs/op
-BenchmarkAttrs/Text_discard/10_args-8        	  748605	      1706 ns/op	     224 B/op	       5 allocs/op
-BenchmarkAttrs/Text_discard/10_args-8        	  709474	      1759 ns/op	     224 B/op	       5 allocs/op
-BenchmarkAttrs/Text_discard/40_args-8        	  236040	      5644 ns/op	    1477 B/op	      17 allocs/op
-BenchmarkAttrs/Text_discard/40_args-8        	  222492	      5453 ns/op	    1477 B/op	      17 allocs/op
-BenchmarkAttrs/Text_discard/40_args-8        	  220213	      5867 ns/op	    1477 B/op	      17 allocs/op
-BenchmarkAttrs/Text_discard/40_args-8        	  207702	      5686 ns/op	    1477 B/op	      17 allocs/op
-BenchmarkAttrs/Text_discard/40_args-8        	  220738	      5645 ns/op	    1477 B/op	      17 allocs/op
-BenchmarkAttrs/JSON_discard/5_args-8         	 1363849	       898.6 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args-8         	 1335759	       865.5 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args-8         	 1270100	       925.2 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args-8         	 1355726	       862.5 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args-8         	 1241948	       925.0 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1311213	       849.4 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1379370	       956.9 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1276497	       888.0 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1353361	       923.2 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1378537	       887.3 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/10_args-8        	  822774	      1655 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/10_args-8        	  678620	      1558 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/10_args-8        	  831974	      1508 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/10_args-8        	  786314	      1480 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/10_args-8        	  899043	      1508 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/40_args-8        	  248425	      5033 ns/op	    1412 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/40_args-8        	  242430	      5039 ns/op	    1412 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/40_args-8        	  234417	      5039 ns/op	    1412 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/40_args-8        	  242533	      5150 ns/op	    1412 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/40_args-8        	  237020	      5171 ns/op	    1412 B/op	       1 allocs/op
+BenchmarkAttrs/disabled/5_args-8  	100000000	        10.05 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args-8  	100000000	        10.06 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args-8  	100000000	        10.02 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args-8  	100000000	        10.02 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args-8  	119552956	        10.04 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args_ctx-8         	68263030	        17.15 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args_ctx-8         	66125575	        17.29 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args_ctx-8         	65876311	        17.53 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args_ctx-8         	59792817	        17.72 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args_ctx-8         	66082474	        17.44 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/10_args-8            	63801992	        18.12 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/10_args-8            	64687180	        18.62 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/10_args-8            	63838999	        18.25 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/10_args-8            	61152484	        18.20 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/10_args-8            	63157089	        18.12 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/40_args-8            	18687324	        63.39 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/40_args-8            	18578457	        63.71 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/40_args-8            	18771891	        63.48 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/40_args-8            	18879216	        64.84 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/40_args-8            	15680052	        74.84 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args-8        	 2555260	       416.7 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args-8        	 2987409	       401.1 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args-8        	 2992893	       400.3 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args-8        	 2982684	       401.5 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args-8        	 2664178	       403.7 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args_ctx-8    	 2934764	       409.5 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args_ctx-8    	 2918563	       412.0 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args_ctx-8    	 2907992	       414.4 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args_ctx-8    	 2917866	       412.3 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args_ctx-8    	 2866125	       416.5 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/10_args-8       	 1785664	       722.7 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/10_args-8       	 1708686	       678.0 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/10_args-8       	 1737969	       684.0 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/10_args-8       	 1761217	       694.8 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/10_args-8       	 1736191	       678.7 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/40_args-8       	  477662	      2393 ns/op	    1408 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/40_args-8       	  495931	      2415 ns/op	    1408 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/40_args-8       	  537381	      2516 ns/op	    1408 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/40_args-8       	  494548	      2444 ns/op	    1408 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/40_args-8       	  534930	      2352 ns/op	    1408 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/5_args-8     	 2438030	       497.6 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args-8     	 2383900	       494.3 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args-8     	 2432466	       487.7 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args-8     	 2462598	       486.1 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args-8     	 2440650	       494.3 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 2427572	       495.4 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 2421992	       495.8 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 2408522	       500.9 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 2437830	       506.7 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 2258314	       491.0 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/10_args-8    	 1310647	       944.1 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/10_args-8    	 1325214	       907.1 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/10_args-8    	 1309946	       913.8 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/10_args-8    	 1216821	       988.1 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/10_args-8    	 1318623	       972.5 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/40_args-8    	  305096	      3805 ns/op	    1412 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/40_args-8    	  325173	      3224 ns/op	    1412 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/40_args-8    	  358047	      3181 ns/op	    1412 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/40_args-8    	  360211	      3240 ns/op	    1412 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/40_args-8    	  366141	      3289 ns/op	    1413 B/op	       1 allocs/op
+BenchmarkAttrs/Text_discard/5_args-8         	 1000000	      1127 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args-8         	  960163	      1059 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args-8         	  967842	      1099 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args-8         	 1000000	      1064 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args-8         	 1000000	      1049 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1000000	      1077 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1000000	      1060 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args_ctx-8     	  980160	      1053 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1000000	      1041 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1117348	      1093 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/10_args-8        	  791455	      1719 ns/op	     224 B/op	       5 allocs/op
+BenchmarkAttrs/Text_discard/10_args-8        	  781164	      1885 ns/op	     224 B/op	       5 allocs/op
+BenchmarkAttrs/Text_discard/10_args-8        	  661323	      1904 ns/op	     224 B/op	       5 allocs/op
+BenchmarkAttrs/Text_discard/10_args-8        	  656154	      1956 ns/op	     224 B/op	       5 allocs/op
+BenchmarkAttrs/Text_discard/10_args-8        	  646381	      1957 ns/op	     224 B/op	       5 allocs/op
+BenchmarkAttrs/Text_discard/40_args-8        	  199566	      6234 ns/op	    1477 B/op	      17 allocs/op
+BenchmarkAttrs/Text_discard/40_args-8        	  190665	      6082 ns/op	    1477 B/op	      17 allocs/op
+BenchmarkAttrs/Text_discard/40_args-8        	  195008	      6248 ns/op	    1477 B/op	      17 allocs/op
+BenchmarkAttrs/Text_discard/40_args-8        	  204160	      6300 ns/op	    1477 B/op	      17 allocs/op
+BenchmarkAttrs/Text_discard/40_args-8        	  199836	      6213 ns/op	    1477 B/op	      17 allocs/op
+BenchmarkAttrs/JSON_discard/5_args-8         	 1238695	       953.3 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args-8         	 1222155	       972.0 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args-8         	 1205894	       969.4 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args-8         	 1226110	       985.6 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args-8         	 1221817	       968.7 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1000000	      1018 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1153074	       935.5 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1395823	       885.8 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1275787	       916.2 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1331715	       914.6 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/10_args-8        	  856378	      1494 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/10_args-8        	  809318	      1496 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/10_args-8        	  856154	      1497 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/10_args-8        	  790920	      1506 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/10_args-8        	  895033	      1488 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/40_args-8        	  230246	      5037 ns/op	    1412 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/40_args-8        	  245506	      5023 ns/op	    1412 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/40_args-8        	  235054	      5118 ns/op	    1412 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/40_args-8        	  222040	      5010 ns/op	    1412 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/40_args-8        	  237818	      5117 ns/op	    1412 B/op	       1 allocs/op
 PASS
-ok  	golang.org/x/exp/slog/benchmarks	147.035s
+ok  	golang.org/x/exp/slog/benchmarks	148.040s
diff --git a/slog/benchmarks/slog.bench b/slog/benchmarks/slog.bench
index 33ce0cb..e168ba5 100644
--- a/slog/benchmarks/slog.bench
+++ b/slog/benchmarks/slog.bench
@@ -2,105 +2,105 @@
 goarch: amd64
 pkg: golang.org/x/exp/slog/benchmarks
 cpu: Intel(R) Xeon(R) CPU @ 2.20GHz
-BenchmarkAttrs/disabled/5_args-8  	98288526	        11.02 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args-8  	100000000	        10.97 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args-8  	100000000	        11.38 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args-8  	100000000	        11.00 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args-8  	100000000	        10.99 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args_ctx-8         	100000000	        10.98 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args_ctx-8         	100000000	        11.01 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args_ctx-8         	94221319	        11.01 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args_ctx-8         	100000000	        11.04 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/5_args_ctx-8         	100000000	        11.00 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/10_args-8            	57471814	        19.32 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/10_args-8            	61708424	        19.16 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/10_args-8            	57874836	        19.17 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/10_args-8            	61938594	        19.65 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/10_args-8            	59963071	        19.16 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/40_args-8            	18328663	        64.90 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/40_args-8            	18434060	        65.34 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/40_args-8            	18177505	        65.14 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/40_args-8            	18379885	        65.51 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/disabled/40_args-8            	18349190	        65.16 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args-8        	14130172	        85.01 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args-8        	14645642	        85.50 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args-8        	13869007	        84.77 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args-8        	13934444	        84.92 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args-8        	14232910	        84.39 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args_ctx-8    	14116840	        85.75 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args_ctx-8    	13792731	        84.49 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args_ctx-8    	14136980	        86.16 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args_ctx-8    	12695575	        85.25 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/5_args_ctx-8    	14096670	        85.01 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/async_discard/10_args-8       	 4446147	       293.0 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/10_args-8       	 4037497	       288.3 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/10_args-8       	 4345414	       301.7 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/10_args-8       	 4287226	       287.5 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/10_args-8       	 4355980	       275.2 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/40_args-8       	 1302829	       938.0 ns/op	    1408 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/40_args-8       	 1310755	       956.6 ns/op	    1408 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/40_args-8       	 1292900	       964.9 ns/op	    1408 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/40_args-8       	 1257229	       966.8 ns/op	    1408 B/op	       1 allocs/op
-BenchmarkAttrs/async_discard/40_args-8       	 1000000	      1053 ns/op	    1408 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/5_args-8     	 6900655	       166.0 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args-8     	 6325740	       162.1 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args-8     	 4901541	       232.9 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args-8     	 7193606	       170.2 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args-8     	 7622880	       157.6 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 5037357	       272.8 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 6330247	       166.2 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 7170688	       181.0 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 7848153	       168.8 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 6864308	       162.5 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/fastText_discard/10_args-8    	 2274127	       513.1 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/10_args-8    	 2399744	       509.5 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/10_args-8    	 2336054	       519.0 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/10_args-8    	 2369473	       519.8 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/10_args-8    	 2346710	       512.1 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/40_args-8    	  643897	      1977 ns/op	    1412 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/40_args-8    	  537020	      2000 ns/op	    1412 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/40_args-8    	  647682	      2021 ns/op	    1412 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/40_args-8    	  538916	      2101 ns/op	    1412 B/op	       1 allocs/op
-BenchmarkAttrs/fastText_discard/40_args-8    	  585639	      2006 ns/op	    1412 B/op	       1 allocs/op
-BenchmarkAttrs/Text_discard/5_args-8         	 1630633	       735.1 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args-8         	 1586420	       758.0 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args-8         	 1547044	       760.7 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args-8         	 1576621	       737.8 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args-8         	 1556031	       788.1 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1555112	       778.1 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1531965	       811.8 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1514307	       791.6 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1596018	       758.4 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1615444	       770.7 ns/op	       8 B/op	       2 allocs/op
-BenchmarkAttrs/Text_discard/10_args-8        	  972390	      1375 ns/op	     224 B/op	       5 allocs/op
-BenchmarkAttrs/Text_discard/10_args-8        	  912907	      1343 ns/op	     224 B/op	       5 allocs/op
-BenchmarkAttrs/Text_discard/10_args-8        	  978176	      1349 ns/op	     224 B/op	       5 allocs/op
-BenchmarkAttrs/Text_discard/10_args-8        	  914865	      1307 ns/op	     224 B/op	       5 allocs/op
-BenchmarkAttrs/Text_discard/10_args-8        	 1000000	      1511 ns/op	     224 B/op	       5 allocs/op
-BenchmarkAttrs/Text_discard/40_args-8        	  240639	      4929 ns/op	    1477 B/op	      17 allocs/op
-BenchmarkAttrs/Text_discard/40_args-8        	  279088	      4647 ns/op	    1476 B/op	      17 allocs/op
-BenchmarkAttrs/Text_discard/40_args-8        	  266191	      4596 ns/op	    1477 B/op	      17 allocs/op
-BenchmarkAttrs/Text_discard/40_args-8        	  256312	      4727 ns/op	    1477 B/op	      17 allocs/op
-BenchmarkAttrs/Text_discard/40_args-8        	  281548	      4638 ns/op	    1476 B/op	      17 allocs/op
-BenchmarkAttrs/JSON_discard/5_args-8         	 1768279	       664.7 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args-8         	 1882438	       669.6 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args-8         	 1936932	       589.6 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args-8         	 1823818	       612.8 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args-8         	 1839082	       610.1 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1996665	       606.6 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1916376	       616.2 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 2042916	       592.5 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1744138	       635.5 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1841967	       635.2 ns/op	       0 B/op	       0 allocs/op
-BenchmarkAttrs/JSON_discard/10_args-8        	 1000000	      1126 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/10_args-8        	 1000000	      1196 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/10_args-8        	 1000000	      1129 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/10_args-8        	 1000000	      1165 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/10_args-8        	 1000000	      1156 ns/op	     208 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/40_args-8        	  318490	      4084 ns/op	    1411 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/40_args-8        	  306403	      4194 ns/op	    1411 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/40_args-8        	  303225	      4142 ns/op	    1411 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/40_args-8        	  343528	      4046 ns/op	    1411 B/op	       1 allocs/op
-BenchmarkAttrs/JSON_discard/40_args-8        	  311587	      4043 ns/op	    1411 B/op	       1 allocs/op
+BenchmarkAttrs/disabled/5_args-8  	100000000	        10.01 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args-8  	100000000	        10.02 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args-8  	100000000	        10.01 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args-8  	100000000	        10.06 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args-8  	100000000	        10.13 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args_ctx-8         	65082175	        17.35 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args_ctx-8         	67560685	        17.60 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args_ctx-8         	66480818	        17.88 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args_ctx-8         	62164170	        17.57 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/5_args_ctx-8         	64041057	        17.29 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/10_args-8            	61310364	        18.20 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/10_args-8            	63852882	        18.28 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/10_args-8            	64814130	        18.18 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/10_args-8            	62238019	        18.21 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/10_args-8            	63806989	        18.15 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/40_args-8            	18776562	        63.85 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/40_args-8            	18797630	        63.82 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/40_args-8            	18422196	        63.93 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/40_args-8            	18422751	        63.69 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/disabled/40_args-8            	18699580	        63.86 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args-8        	14650714	        82.65 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args-8        	14257166	        82.45 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args-8        	14072110	        83.14 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args-8        	14197720	        83.68 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args-8        	14053675	        81.93 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args_ctx-8    	14433480	        82.02 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args_ctx-8    	14615121	        83.06 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args_ctx-8    	14488219	        82.62 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args_ctx-8    	14402234	        83.07 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/5_args_ctx-8    	14087228	        82.22 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/async_discard/10_args-8       	 4281078	       275.1 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/10_args-8       	 4331724	       272.1 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/10_args-8       	 4330180	       278.8 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/10_args-8       	 4390335	       277.5 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/10_args-8       	 4445980	       273.5 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/40_args-8       	 1291330	       946.1 ns/op	    1408 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/40_args-8       	 1302540	       918.7 ns/op	    1408 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/40_args-8       	 1255257	       936.8 ns/op	    1408 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/40_args-8       	 1317576	       940.5 ns/op	    1408 B/op	       1 allocs/op
+BenchmarkAttrs/async_discard/40_args-8       	 1287027	       936.7 ns/op	    1408 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/5_args-8     	 6653914	       187.8 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args-8     	 6042549	       196.1 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args-8     	 6296040	       186.4 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args-8     	 4599591	       280.9 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args-8     	 7331044	       156.6 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 6785898	       189.7 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 4894164	       235.7 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 6214660	       221.0 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 7717798	       160.1 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/5_args_ctx-8 	 5849185	       189.0 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/fastText_discard/10_args-8    	 2332070	       524.3 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/10_args-8    	 2269552	       516.7 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/10_args-8    	 2384461	       518.7 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/10_args-8    	 2349918	       520.6 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/10_args-8    	 2267647	       518.6 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/40_args-8    	  629695	      2012 ns/op	    1412 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/40_args-8    	  590324	      2017 ns/op	    1412 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/40_args-8    	  529468	      1988 ns/op	    1412 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/40_args-8    	  590164	      2044 ns/op	    1412 B/op	       1 allocs/op
+BenchmarkAttrs/fastText_discard/40_args-8    	  694128	      2013 ns/op	    1412 B/op	       1 allocs/op
+BenchmarkAttrs/Text_discard/5_args-8         	 1480792	       729.7 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args-8         	 1511230	       754.2 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args-8         	 1536628	       753.5 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args-8         	 1574944	       743.5 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args-8         	 1573424	       759.5 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1560421	       747.1 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1571598	       772.1 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1530306	       751.5 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1533139	       744.9 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/5_args_ctx-8     	 1560169	       759.3 ns/op	       8 B/op	       2 allocs/op
+BenchmarkAttrs/Text_discard/10_args-8        	 1000000	      1340 ns/op	     224 B/op	       5 allocs/op
+BenchmarkAttrs/Text_discard/10_args-8        	  937830	      1380 ns/op	     224 B/op	       5 allocs/op
+BenchmarkAttrs/Text_discard/10_args-8        	  952281	      1449 ns/op	     224 B/op	       5 allocs/op
+BenchmarkAttrs/Text_discard/10_args-8        	 1000000	      1295 ns/op	     224 B/op	       5 allocs/op
+BenchmarkAttrs/Text_discard/10_args-8        	  945732	      1310 ns/op	     224 B/op	       5 allocs/op
+BenchmarkAttrs/Text_discard/40_args-8        	  275960	      4830 ns/op	    1476 B/op	      17 allocs/op
+BenchmarkAttrs/Text_discard/40_args-8        	  254529	      4716 ns/op	    1476 B/op	      17 allocs/op
+BenchmarkAttrs/Text_discard/40_args-8        	  269155	      4695 ns/op	    1476 B/op	      17 allocs/op
+BenchmarkAttrs/Text_discard/40_args-8        	  273496	      4687 ns/op	    1476 B/op	      17 allocs/op
+BenchmarkAttrs/Text_discard/40_args-8        	  266942	      4752 ns/op	    1476 B/op	      17 allocs/op
+BenchmarkAttrs/JSON_discard/5_args-8         	 1881610	       635.4 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args-8         	 1880308	       618.5 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args-8         	 1867201	       597.9 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args-8         	 1799612	       601.2 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args-8         	 1863672	       642.6 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1759726	       652.0 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1825704	       661.6 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1804497	       656.5 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1925446	       646.4 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/5_args_ctx-8     	 1963968	       577.1 ns/op	       0 B/op	       0 allocs/op
+BenchmarkAttrs/JSON_discard/10_args-8        	 1000000	      1143 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/10_args-8        	 1000000	      1176 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/10_args-8        	 1000000	      1157 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/10_args-8        	 1000000	      1161 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/10_args-8        	 1000000	      1199 ns/op	     208 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/40_args-8        	  276656	      4100 ns/op	    1411 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/40_args-8        	  289512	      4157 ns/op	    1411 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/40_args-8        	  296378	      3985 ns/op	    1411 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/40_args-8        	  307710	      4153 ns/op	    1411 B/op	       1 allocs/op
+BenchmarkAttrs/JSON_discard/40_args-8        	  299431	      4021 ns/op	    1411 B/op	       1 allocs/op
 PASS
-ok  	golang.org/x/exp/slog/benchmarks	146.959s
+ok  	golang.org/x/exp/slog/benchmarks	146.279s
diff --git a/slog/context.go b/slog/context.go
index 538e350..504adaf 100644
--- a/slog/context.go
+++ b/slog/context.go
@@ -10,14 +10,14 @@
 
 // NewContext returns a context that contains the given Logger.
 // Use FromContext to retrieve the Logger.
-func NewContext(ctx context.Context, l Logger) context.Context {
+func NewContext(ctx context.Context, l *Logger) context.Context {
 	return context.WithValue(ctx, contextKey{}, l)
 }
 
 // FromContext returns the Logger stored in ctx by NewContext, or the default
 // Logger if there is none.
-func FromContext(ctx context.Context) Logger {
-	if l, ok := ctx.Value(contextKey{}).(Logger); ok {
+func FromContext(ctx context.Context) *Logger {
+	if l, ok := ctx.Value(contextKey{}).(*Logger); ok {
 		return l
 	}
 	return Default()
@@ -25,6 +25,6 @@
 
 // Ctx retrieves a Logger from the given context using FromContext. Then it adds
 // the given context to the Logger using WithContext and returns the result.
-func Ctx(ctx context.Context) Logger {
+func Ctx(ctx context.Context) *Logger {
 	return FromContext(ctx).WithContext(ctx)
 }
diff --git a/slog/logger.go b/slog/logger.go
index 8be8c34..7d1bfbd 100644
--- a/slog/logger.go
+++ b/slog/logger.go
@@ -14,18 +14,16 @@
 var defaultLogger atomic.Value
 
 func init() {
-	defaultLogger.Store(Logger{
-		handler: newDefaultHandler(log.Output),
-	})
+	defaultLogger.Store(New(newDefaultHandler(log.Output)))
 }
 
 // Default returns the default Logger.
-func Default() Logger { return defaultLogger.Load().(Logger) }
+func Default() *Logger { return defaultLogger.Load().(*Logger) }
 
 // SetDefault makes l the default Logger.
 // After this call, output from the log package's default Logger
 // (as with [log.Print], etc.) will be logged at InfoLevel using l's Handler.
-func SetDefault(l Logger) {
+func SetDefault(l *Logger) {
 	defaultLogger.Store(l)
 	// If the default's handler is a defaultHandler, then don't use a handleWriter,
 	// or we'll deadlock as they both try to acquire the log default mutex.
@@ -72,10 +70,10 @@
 }
 
 // Handler returns l's Handler.
-func (l Logger) Handler() Handler { return l.handler }
+func (l *Logger) Handler() Handler { return l.handler }
 
 // Context returns l's context.
-func (l Logger) Context() context.Context { return l.ctx }
+func (l *Logger) Context() context.Context { return l.ctx }
 
 // With returns a new Logger that includes the given arguments, converted to
 // Attrs as in [Logger.Log]. The Attrs will be added to each output from the
@@ -83,7 +81,7 @@
 //
 // The new Logger's handler is the result of calling WithAttrs on the receiver's
 // handler.
-func (l Logger) With(args ...any) Logger {
+func (l *Logger) With(args ...any) *Logger {
 	var (
 		attr  Attr
 		attrs []Attr
@@ -92,34 +90,33 @@
 		attr, args = argsToAttr(args)
 		attrs = append(attrs, attr)
 	}
-	l.handler = l.handler.WithAttrs(attrs)
-	return l
+	return New(l.handler.WithAttrs(attrs))
 }
 
 // WithGroup returns a new Logger that starts a group. The keys of all
 // attributes added to the Logger will be qualified by the given name.
-func (l Logger) WithGroup(name string) Logger {
-	l.handler = l.handler.WithGroup(name)
-	return l
+func (l *Logger) WithGroup(name string) *Logger {
+	return New(l.handler.WithGroup(name))
 }
 
 // WithContext returns a new Logger with the same handler
 // as the receiver and the given context.
-func (l Logger) WithContext(ctx context.Context) Logger {
-	l.ctx = ctx
-	return l
+func (l *Logger) WithContext(ctx context.Context) *Logger {
+	l2 := *l
+	l2.ctx = ctx
+	return &l2
 }
 
 // New creates a new Logger with the given Handler.
-func New(h Handler) Logger { return Logger{handler: h} }
+func New(h Handler) *Logger { return &Logger{handler: h} }
 
 // With calls Logger.With on the default logger.
-func With(args ...any) Logger {
+func With(args ...any) *Logger {
 	return Default().With(args...)
 }
 
 // Enabled reports whether l emits log records at the given level.
-func (l Logger) Enabled(level Level) bool {
+func (l *Logger) Enabled(level Level) bool {
 	return l.Handler().Enabled(level)
 }
 
@@ -133,14 +130,14 @@
 //     the following argument is treated as the value and the two are combined
 //     into an Attr.
 //   - Otherwise, the argument is treated as a value with key "!BADKEY".
-func (l Logger) Log(level Level, msg string, args ...any) {
+func (l *Logger) Log(level Level, msg string, args ...any) {
 	l.LogDepth(0, level, msg, args...)
 }
 
 // LogDepth is like [Logger.Log], but accepts a call depth to adjust the
 // file and line number in the log record. 0 refers to the caller
 // of LogDepth; 1 refers to the caller's caller; and so on.
-func (l Logger) LogDepth(calldepth int, level Level, msg string, args ...any) {
+func (l *Logger) LogDepth(calldepth int, level Level, msg string, args ...any) {
 	if !l.Enabled(level) {
 		return
 	}
@@ -149,18 +146,18 @@
 	_ = l.Handler().Handle(r)
 }
 
-func (l Logger) makeRecord(msg string, level Level, depth int) Record {
+func (l *Logger) makeRecord(msg string, level Level, depth int) Record {
 	return NewRecord(time.Now(), level, msg, depth+5, l.ctx)
 }
 
 // LogAttrs is a more efficient version of [Logger.Log] that accepts only Attrs.
-func (l Logger) LogAttrs(level Level, msg string, attrs ...Attr) {
+func (l *Logger) LogAttrs(level Level, msg string, attrs ...Attr) {
 	l.LogAttrsDepth(0, level, msg, attrs...)
 }
 
 // LogAttrsDepth is like [Logger.LogAttrs], but accepts a call depth argument
 // which it interprets like [Logger.LogDepth].
-func (l Logger) LogAttrsDepth(calldepth int, level Level, msg string, attrs ...Attr) {
+func (l *Logger) LogAttrsDepth(calldepth int, level Level, msg string, attrs ...Attr) {
 	if !l.Enabled(level) {
 		return
 	}
@@ -170,24 +167,24 @@
 }
 
 // Debug logs at DebugLevel.
-func (l Logger) Debug(msg string, args ...any) {
+func (l *Logger) Debug(msg string, args ...any) {
 	l.LogDepth(0, DebugLevel, msg, args...)
 }
 
 // Info logs at InfoLevel.
-func (l Logger) Info(msg string, args ...any) {
+func (l *Logger) Info(msg string, args ...any) {
 	l.LogDepth(0, InfoLevel, msg, args...)
 }
 
 // Warn logs at WarnLevel.
-func (l Logger) Warn(msg string, args ...any) {
+func (l *Logger) Warn(msg string, args ...any) {
 	l.LogDepth(0, WarnLevel, msg, args...)
 }
 
 // Error logs at ErrorLevel.
 // If err is non-nil, Error appends Any("err", err)
 // to the list of attributes.
-func (l Logger) Error(msg string, err error, args ...any) {
+func (l *Logger) Error(msg string, err error, args ...any) {
 	if err != nil {
 		// TODO: avoid the copy.
 		args = append(args[:len(args):len(args)], Any("err", err))
diff --git a/slog/logger_test.go b/slog/logger_test.go
index 3d0e5eb..4d49ccb 100644
--- a/slog/logger_test.go
+++ b/slog/logger_test.go
@@ -158,7 +158,7 @@
 
 func TestAlloc(t *testing.T) {
 	dl := New(discardHandler{})
-	defer func(d Logger) { SetDefault(d) }(Default())
+	defer func(d *Logger) { SetDefault(d) }(Default())
 	SetDefault(dl)
 
 	t.Run("Info", func(t *testing.T) {
@@ -386,7 +386,7 @@
 	b.Run("WithContext", func(b *testing.B) {
 		b.ReportAllocs()
 		for i := 0; i < b.N; i++ {
-			l.WithContext(ctx).LogAttrs(InfoLevel, "msg", Int("a", 1), String("b", "two"), Bool("c", true))
+			l.WithContext(ctx).LogAttrs(InfoLevel, "msg2", Int("a", 1), String("b", "two"), Bool("c", true))
 		}
 	})
 	b.Run("WithContext-parallel", func(b *testing.B) {
@@ -397,5 +397,13 @@
 			}
 		})
 	})
-
+	b.Run("Ctx", func(b *testing.B) {
+		dl := Default()
+		SetDefault(l)
+		defer SetDefault(dl)
+		b.ReportAllocs()
+		for i := 0; i < b.N; i++ {
+			Ctx(ctx).LogAttrs(InfoLevel, "msg", Int("a", 1), String("b", "two"), Bool("c", true))
+		}
+	})
 }
diff --git a/slog/noplog.bench b/slog/noplog.bench
index 26d67ef..ed9296f 100644
--- a/slog/noplog.bench
+++ b/slog/noplog.bench
@@ -2,30 +2,35 @@
 goarch: amd64
 pkg: golang.org/x/exp/slog
 cpu: Intel(R) Xeon(R) CPU @ 2.20GHz
-BenchmarkNopLog/attrs-8         	 1000000	      1120 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/attrs-8         	 1000000	      1087 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/attrs-8         	 1000000	      1125 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/attrs-8         	 1000000	      1112 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/attrs-8         	 1000000	      1116 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/attrs-parallel-8         	 3975526	       297.7 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/attrs-parallel-8         	 4036947	       308.5 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/attrs-parallel-8         	 4063410	       297.1 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/attrs-parallel-8         	 4042863	       293.7 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/attrs-parallel-8         	 4067066	       295.9 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/keys-values-8            	 1000000	      1051 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/keys-values-8            	 1000000	      1050 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/keys-values-8            	 1000000	      1044 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/keys-values-8            	 1000000	      1057 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/keys-values-8            	 1000000	      1064 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/WithContext-8            	 1000000	      1103 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/WithContext-8            	 1000000	      1103 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/WithContext-8            	 1000000	      1112 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/WithContext-8            	 1000000	      1081 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/WithContext-8            	 1000000	      1112 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/WithContext-parallel-8   	 4040090	       297.1 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/WithContext-parallel-8   	 4025874	       297.8 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/WithContext-parallel-8   	 4039935	       296.0 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/WithContext-parallel-8   	 4054540	       299.9 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNopLog/WithContext-parallel-8   	 4045884	       295.9 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/attrs-8         	 1000000	      1090 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/attrs-8         	 1000000	      1097 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/attrs-8         	 1000000	      1078 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/attrs-8         	 1000000	      1095 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/attrs-8         	 1000000	      1096 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/attrs-parallel-8         	 4007268	       308.2 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/attrs-parallel-8         	 4016138	       299.7 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/attrs-parallel-8         	 4020529	       305.9 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/attrs-parallel-8         	 3977829	       303.4 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/attrs-parallel-8         	 3225438	       318.5 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/keys-values-8            	 1179256	       994.2 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/keys-values-8            	 1000000	      1002 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/keys-values-8            	 1216710	       993.2 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/keys-values-8            	 1000000	      1013 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/keys-values-8            	 1000000	      1016 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/WithContext-8            	  989066	      1163 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/WithContext-8            	  994116	      1163 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/WithContext-8            	 1000000	      1152 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/WithContext-8            	  991675	      1165 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/WithContext-8            	  965268	      1166 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/WithContext-parallel-8   	 3955503	       303.3 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/WithContext-parallel-8   	 3861188	       307.8 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/WithContext-parallel-8   	 3967752	       303.9 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/WithContext-parallel-8   	 3955203	       302.7 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/WithContext-parallel-8   	 3948278	       301.1 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/Ctx-8                    	  940622	      1247 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/Ctx-8                    	  936381	      1257 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/Ctx-8                    	  959730	      1266 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/Ctx-8                    	  943473	      1290 ns/op	       0 B/op	       0 allocs/op
+BenchmarkNopLog/Ctx-8                    	  919414	      1259 ns/op	       0 B/op	       0 allocs/op
 PASS
-ok  	golang.org/x/exp/slog	31.654s
+ok  	golang.org/x/exp/slog	40.566s