Robert Griesemer e193725184 strings: simpler and slightly faster implementation of FieldsFunc ... Removed the need for maintaining an extra variable in one of the inner loops, leading to a slight speed-up for short strings. Benchmarks run on a "quiet" MacBook Pro, 3.3GHz Dual-Core Intel Core i7, with 16GB 2133MHz LPDDR3 RAM running macOS 10.15.4. name old time/op new time/op delta FieldsFunc/ASCII/16-4 147ns ± 0% 144ns ± 1% -2.04% (p=0.000 n=4+5) FieldsFunc/ASCII/256-4 1.63µs ± 0% 1.59µs ± 1% -2.50% (p=0.008 n=5+5) FieldsFunc/ASCII/4096-4 30.0µs ± 0% 29.3µs ± 2% ~ (p=0.190 n=4+5) FieldsFunc/ASCII/65536-4 491µs ± 5% 473µs ± 2% ~ (p=0.095 n=5+5) FieldsFunc/ASCII/1048576-4 8.02ms ± 7% 7.85ms ± 4% ~ (p=0.548 n=5+5) FieldsFunc/Mixed/16-4 182ns ± 1% 181ns ± 4% ~ (p=0.357 n=5+5) FieldsFunc/Mixed/256-4 1.74µs ± 1% 1.74µs ± 1% ~ (p=0.881 n=5+5) FieldsFunc/Mixed/4096-4 34.9µs ± 2% 34.7µs ± 0% ~ (p=0.310 n=5+5) FieldsFunc/Mixed/65536-4 595µs ± 1% 589µs ± 2% ~ (p=0.095 n=5+5) FieldsFunc/Mixed/1048576-4 10.1ms ± 3% 9.8ms ± 2% ~ (p=0.095 n=5+5) name old speed new speed delta FieldsFunc/ASCII/16-4 109MB/s ± 1% 111MB/s ± 1% +2.33% (p=0.008 n=5+5) FieldsFunc/ASCII/256-4 157MB/s ± 0% 161MB/s ± 1% +2.57% (p=0.008 n=5+5) FieldsFunc/ASCII/4096-4 137MB/s ± 0% 140MB/s ± 2% ~ (p=0.190 n=4+5) FieldsFunc/ASCII/65536-4 134MB/s ± 4% 139MB/s ± 2% ~ (p=0.095 n=5+5) FieldsFunc/ASCII/1048576-4 131MB/s ± 6% 134MB/s ± 4% ~ (p=0.548 n=5+5) FieldsFunc/Mixed/16-4 87.8MB/s ± 1% 88.3MB/s ± 4% ~ (p=0.421 n=5+5) FieldsFunc/Mixed/256-4 147MB/s ± 1% 147MB/s ± 1% ~ (p=0.841 n=5+5) FieldsFunc/Mixed/4096-4 117MB/s ± 2% 118MB/s ± 0% ~ (p=0.310 n=5+5) FieldsFunc/Mixed/65536-4 110MB/s ± 1% 111MB/s ± 2% ~ (p=0.095 n=5+5) FieldsFunc/Mixed/1048576-4 104MB/s ± 3% 107MB/s ± 2% ~ (p=0.095 n=5+5) name old alloc/op new alloc/op delta FieldsFunc/ASCII/16-4 32.0B ± 0% 32.0B ± 0% ~ (all equal) FieldsFunc/ASCII/256-4 352B ± 0% 352B ± 0% ~ (all equal) FieldsFunc/ASCII/4096-4 21.9kB ± 0% 21.9kB ± 0% ~ (all equal) FieldsFunc/ASCII/65536-4 448kB ± 0% 448kB ± 0% ~ (all equal) FieldsFunc/ASCII/1048576-4 8.85MB ± 0% 8.85MB ± 0% ~ (p=0.738 n=5+5) FieldsFunc/Mixed/16-4 48.0B ± 0% 48.0B ± 0% ~ (all equal) FieldsFunc/Mixed/256-4 416B ± 0% 416B ± 0% ~ (all equal) FieldsFunc/Mixed/4096-4 21.5kB ± 0% 21.5kB ± 0% ~ (all equal) FieldsFunc/Mixed/65536-4 448kB ± 0% 448kB ± 0% ~ (all equal) FieldsFunc/Mixed/1048576-4 8.85MB ± 0% 8.85MB ± 0% ~ (p=0.690 n=5+5) name old allocs/op new allocs/op delta FieldsFunc/ASCII/16-4 1.00 ± 0% 1.00 ± 0% ~ (all equal) FieldsFunc/ASCII/256-4 1.00 ± 0% 1.00 ± 0% ~ (all equal) FieldsFunc/ASCII/4096-4 5.00 ± 0% 5.00 ± 0% ~ (all equal) FieldsFunc/ASCII/65536-4 12.0 ± 0% 12.0 ± 0% ~ (all equal) FieldsFunc/ASCII/1048576-4 24.0 ± 0% 24.0 ± 0% ~ (all equal) FieldsFunc/Mixed/16-4 1.00 ± 0% 1.00 ± 0% ~ (all equal) FieldsFunc/Mixed/256-4 1.00 ± 0% 1.00 ± 0% ~ (all equal) FieldsFunc/Mixed/4096-4 5.00 ± 0% 5.00 ± 0% ~ (all equal) FieldsFunc/Mixed/65536-4 12.0 ± 0% 12.0 ± 0% ~ (all equal) FieldsFunc/Mixed/1048576-4 24.0 ± 0% 24.0 ± 0% ~ (all equal) Change-Id: I06828d798ca1a624a26edd7f7b68c3bf2fc28f84 Reviewed-on: https://go-review.googlesource.com/c/go/+/229765 Reviewed-by: Martin Möhrmann <moehrmann@google.com>		2020-04-28 20:18:12 +00:00
..
builder_test.go	strings: remove a redundant and flaky part of a test	2019-10-31 20:45:40 +00:00
builder.go	cmd/compile: add -d=checkptr to validate unsafe.Pointer rules	2019-10-17 00:40:21 +00:00
compare_test.go	strings: lower running time of TestCompareStrings	2018-11-04 18:55:55 +00:00
compare.go
example_test.go	strings: clarify usage of Title and ToTitle	2019-07-30 02:52:57 +00:00
export_test.go
reader_test.go	bytes, strings: fix Reader.UnreadRune returning without error on a zero Reader	2018-10-29 20:07:25 +00:00
reader.go	bytes, strings: fix Reader.UnreadRune returning without error on a zero Reader	2018-10-29 20:07:25 +00:00
replace_test.go
replace.go	strings: document that order of pairs matters in NewReplacer	2019-07-10 21:26:21 +00:00
search_test.go
search.go
strings_test.go	strings, bytes: improve IndexAny and LastIndexAny performance	2020-03-11 05:13:13 +00:00
strings.go	strings: simpler and slightly faster implementation of FieldsFunc	2020-04-28 20:18:12 +00:00