runtime: change time.now to ABIInternal This reduces the number of instructions executed for time.now by nine, by eliminating the wrapper. Somehow BenchmarkNow is 0.2ns slower. On the other hand BenchmarkNowUnixNano is 0.8ns faster. name old time/op new time/op delta AfterFunc-12 66.7µs ± 4% 67.3µs ± 2% ~ (p=0.573 n=20+18) After-12 97.6µs ± 4% 97.4µs ± 4% ~ (p=0.758 n=20+20) Stop-12 66.7µs ±12% 64.8µs ±10% ~ (p=0.072 n=20+20) SimultaneousAfterFunc-12 109µs ± 0% 110µs ± 1% +1.47% (p=0.000 n=17+20) StartStop-12 31.9µs ±15% 32.7µs ±14% ~ (p=0.799 n=20+20) Reset-12 3.67µs ± 2% 3.68µs ± 2% ~ (p=0.132 n=20+20) Sleep-12 132µs ± 2% 133µs ± 2% +0.70% (p=0.035 n=20+19) Ticker-12 32.4µs ± 1% 32.3µs ± 2% ~ (p=0.270 n=20+19) TickerReset-12 3.71µs ± 2% 3.74µs ± 2% +0.89% (p=0.012 n=20+20) TickerResetNaive-12 65.7µs ±10% 67.2µs ±10% ~ (p=0.174 n=20+20) Now-12 29.6ns ± 1% 29.8ns ± 0% +0.78% (p=0.000 n=17+17) NowUnixNano-12 31.1ns ± 1% 30.3ns ± 0% -2.69% (p=0.000 n=19+18) NowUnixMilli-12 30.9ns ± 0% 31.1ns ± 0% +0.90% (p=0.000 n=18+20) NowUnixMicro-12 30.9ns ± 0% 31.1ns ± 1% +0.68% (p=0.000 n=20+18) Format-12 304ns ± 1% 301ns ± 2% -0.81% (p=0.004 n=18+19) FormatNow-12 187ns ± 2% 185ns ± 2% -0.90% (p=0.036 n=20+18) MarshalJSON-12 267ns ± 3% 265ns ± 3% -1.00% (p=0.004 n=18+18) MarshalText-12 267ns ± 2% 265ns ± 3% -0.87% (p=0.038 n=19+20) Parse-12 150ns ± 1% 149ns ± 1% -0.83% (p=0.000 n=18+20) ParseDuration-12 79.6ns ± 0% 80.1ns ± 1% +0.61% (p=0.000 n=20+20) Hour-12 4.42ns ± 1% 4.45ns ± 0% +0.83% (p=0.000 n=20+20) Second-12 4.42ns ± 0% 4.42ns ± 1% ~ (p=0.075 n=18+20) Year-12 11.1ns ± 1% 11.1ns ± 1% ~ (p=0.489 n=20+19) Day-12 14.8ns ± 1% 14.8ns ± 0% ~ (p=0.616 n=20+18) ISOWeek-12 17.2ns ± 1% 17.2ns ± 0% ~ (p=0.179 n=20+19) name old avg-late-ns new avg-late-ns delta ParallelTimerLatency-12 380k ± 4% 379k ± 3% ~ (p=0.879 n=20+19) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=1-12 137k ± 3% 137k ± 2% ~ (p=0.261 n=19+18) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=2-12 106k ±16% 95k ± 8% -9.76% (p=0.003 n=19+20) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=3-12 88.6k ±22% 74.6k ± 3% -15.78% (p=0.000 n=19+20) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=4-12 76.1k ±18% 70.8k ± 5% -7.04% (p=0.020 n=20+20) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=5-12 67.3k ±27% 65.6k ±13% ~ (p=0.211 n=16+18) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=6-12 59.5k ±24% 57.3k ±32% ~ (p=0.607 n=19+20) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=7-12 41.8k ±34% 46.2k ±33% +10.54% (p=0.039 n=17+20) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=8-12 57.5k ±37% 65.6k ±46% ~ (p=0.283 n=17+20) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=9-12 118k ±60% 136k ±59% ~ (p=0.169 n=19+18) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=10-12 3.66M ±236% 2.55M ±36% ~ (p=0.158 n=16+20) StaggeredTickerLatency/work-dur=2ms/tickers-per-P=1-12 81.7k ± 4% 80.7k ± 5% ~ (p=0.107 n=20+19) name old max-late-ns new max-late-ns delta ParallelTimerLatency-12 5.88M ±124% 7.28M ±183% ~ (p=0.640 n=20+20) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=1-12 384k ±17% 371k ±11% ~ (p=0.540 n=17+17) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=2-12 503k ±180% 373k ±19% ~ (p=0.057 n=17+18) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=3-12 519k ±129% 340k ±17% -34.47% (p=0.000 n=18+19) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=4-12 491k ±141% 341k ±26% -30.52% (p=0.015 n=18+17) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=5-12 457k ±123% 405k ±48% ~ (p=0.786 n=17+17) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=6-12 491k ±85% 502k ±74% ~ (p=0.916 n=18+19) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=7-12 572k ±100% 574k ±65% ~ (p=0.858 n=18+17) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=8-12 1.95M ±205% 1.65M ±155% ~ (p=0.641 n=18+19) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=9-12 7.77M ±104% 8.72M ±103% ~ (p=0.512 n=20+20) StaggeredTickerLatency/work-dur=300µs/tickers-per-P=10-12 29.5M ±187% 18.5M ±43% ~ (p=0.186 n=18+20) StaggeredTickerLatency/work-dur=2ms/tickers-per-P=1-12 981k ±14% 1033k ±12% +5.30% (p=0.048 n=20+18) Change-Id: Ie794a932a929b46053a6c3020b67d640b98d2335 Reviewed-on: https://go-review.googlesource.com/c/go/+/315369 Trust: Ian Lance Taylor <iant@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Michael Knyszek <mknyszek@google.com>
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
Gopher image by Renee French, licensed under Creative Commons 3.0 Attributions license.
Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.
Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.
Official binary distributions are available at https://golang.org/dl/.
After downloading a binary release, visit https://golang.org/doc/install for installation instructions.
If a binary distribution is not available for your combination of operating system and architecture, visit https://golang.org/doc/install/source for source installation instructions.
Go is the work of thousands of contributors. We appreciate your help!
To contribute, please read the contribution guidelines at https://golang.org/doc/contribute.html.
Note that the Go project uses the issue tracker for bug reports and proposals only. See https://golang.org/wiki/Questions for a list of places to ask questions about the Go language.