Martin Möhrmann e74c6cd3c0 regexp: add ASCII fast path for context methods ... The step method implementations check directly if the next rune only needs one byte to be decoded and avoid calling utf8.DecodeRune for such ASCII characters. Introduce the same fast path optimization for rune decoding for the context methods. Results for regexp benchmarks that use the context methods: name old time/op new time/op delta AnchoredLiteralShortNonMatch-4 97.5ns ± 1% 94.8ns ± 2% -2.80% (p=0.000 n=45+43) AnchoredShortMatch-4 163ns ± 1% 160ns ± 1% -1.84% (p=0.000 n=46+47) NotOnePassShortA-4 742ns ± 2% 742ns ± 2% ~ (p=0.440 n=49+50) NotOnePassShortB-4 535ns ± 1% 533ns ± 2% -0.37% (p=0.005 n=46+48) OnePassLongPrefix-4 169ns ± 2% 166ns ± 2% -2.06% (p=0.000 n=50+49) Change-Id: Ib302d9e8c63333f02695369fcf9963974362e335 Reviewed-on: https://go-review.googlesource.com/38256 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>		2017-03-23 00:08:20 +00:00
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syntax	regexp/syntax: remove unused flags parameter	2017-03-06 19:11:09 +00:00
testdata	regexp/syntax: fix factoring of common prefixes in alternations	2016-01-08 16:41:46 +00:00
all_test.go	regexp: avoid alloc in QuoteMeta when not quoting	2016-10-19 07:09:08 +00:00
backtrack.go	all: delete dead non-test code	2016-03-25 06:28:13 +00:00
example_test.go
exec2_test.go
exec_test.go	regexp: reduce allocs in regexp.Match for onepass regex	2017-03-23 00:02:55 +00:00
exec.go	regexp: reduce allocs in regexp.Match for onepass regex	2017-03-23 00:02:55 +00:00
find_test.go
onepass_test.go	all: delete dead test code	2016-03-21 07:10:08 +00:00
onepass.go	regexp: remove dead code	2016-10-04 14:49:35 +00:00
regexp.go	regexp: add ASCII fast path for context methods	2017-03-23 00:08:20 +00:00