runtime: add table of size classes in a comment
Change-Id: I52fae67c9aeceaa23e70f2ef0468745b354f8c75
Reviewed-on: https://go-review.googlesource.com/34932
Reviewed-by: Minux Ma <minux@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
diff --git a/src/runtime/sizeclasses.go b/src/runtime/sizeclasses.go
index ec30d15..e616e95 100644
--- a/src/runtime/sizeclasses.go
+++ b/src/runtime/sizeclasses.go
@@ -3,6 +3,74 @@
package runtime
+// class bytes/obj bytes/span objects waste bytes
+// 1 8 8192 1024 0
+// 2 16 8192 512 0
+// 3 32 8192 256 0
+// 4 48 8192 170 32
+// 5 64 8192 128 0
+// 6 80 8192 102 32
+// 7 96 8192 85 32
+// 8 112 8192 73 16
+// 9 128 8192 64 0
+// 10 144 8192 56 128
+// 11 160 8192 51 32
+// 12 176 8192 46 96
+// 13 192 8192 42 128
+// 14 208 8192 39 80
+// 15 224 8192 36 128
+// 16 240 8192 34 32
+// 17 256 8192 32 0
+// 18 288 8192 28 128
+// 19 320 8192 25 192
+// 20 352 8192 23 96
+// 21 384 8192 21 128
+// 22 416 8192 19 288
+// 23 448 8192 18 128
+// 24 480 8192 17 32
+// 25 512 8192 16 0
+// 26 576 8192 14 128
+// 27 640 8192 12 512
+// 28 704 8192 11 448
+// 29 768 8192 10 512
+// 30 896 8192 9 128
+// 31 1024 8192 8 0
+// 32 1152 8192 7 128
+// 33 1280 8192 6 512
+// 34 1408 16384 11 896
+// 35 1536 8192 5 512
+// 36 1792 16384 9 256
+// 37 2048 8192 4 0
+// 38 2304 16384 7 256
+// 39 2688 8192 3 128
+// 40 3072 24576 8 0
+// 41 3200 16384 5 384
+// 42 3456 24576 7 384
+// 43 4096 8192 2 0
+// 44 4864 24576 5 256
+// 45 5376 16384 3 256
+// 46 6144 24576 4 0
+// 47 6528 32768 5 128
+// 48 6784 40960 6 256
+// 49 6912 49152 7 768
+// 50 8192 8192 1 0
+// 51 9472 57344 6 512
+// 52 9728 49152 5 512
+// 53 10240 40960 4 0
+// 54 10880 32768 3 128
+// 55 12288 24576 2 0
+// 56 13568 40960 3 256
+// 57 14336 57344 4 0
+// 58 16384 16384 1 0
+// 59 18432 73728 4 0
+// 60 19072 57344 3 128
+// 61 20480 40960 2 0
+// 62 21760 65536 3 256
+// 63 24576 24576 1 0
+// 64 27264 81920 3 128
+// 65 28672 57344 2 0
+// 66 32768 32768 1 0
+
const (
_MaxSmallSize = 32768
smallSizeDiv = 8
