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- 12 Oct, 2018 4 commits
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Russ Cox authored
There's no point in computing whether we're at the beginning of the line if the NFA isn't going to ask. Wait to compute that until asked. Whatever minor slowdowns were introduced by the conversion to pools that were not repaid by other optimizations are taken care of by this one. name old time/op new time/op delta Find-12 252ns ± 0% 260ns ± 0% +3.34% (p=0.000 n=10+8) FindAllNoMatches-12 136ns ± 4% 134ns ± 4% -0.96% (p=0.033 n=10+10) FindString-12 246ns ± 0% 250ns ± 0% +1.46% (p=0.000 n=8+10) FindSubmatch-12 332ns ± 1% 332ns ± 0% ~ (p=0.101 n=9+10) FindStringSubmatch-12 321ns ± 1% 322ns ± 1% ~ (p=0.717 n=9+10) Literal-12 91.6ns ± 0% 92.3ns ± 0% +0.74% (p=0.000 n=9+9) NotLiteral-12 1.47µs ± 0% 1.47µs ± 0% +0.38% (p=0.000 n=9+8) MatchClass-12 2.15µs ± 0% 2.15µs ± 0% +0.39% (p=0.000 n=10+10) MatchClass_InRange-12 2.09µs ± 0% 2.11µs ± 0% +0.75% (p=0.000 n=9+9) ReplaceAll-12 1.40µs ± 0% 1.40µs ± 0% ~ (p=0.525 n=10+10) AnchoredLiteralShortNonMatch-12 83.5ns ± 0% 81.6ns ± 0% -2.28% (p=0.000 n=9+10) AnchoredLiteralLongNonMatch-12 101ns ± 0% 97ns ± 1% -3.54% (p=0.000 n=10+10) AnchoredShortMatch-12 131ns ± 0% 128ns ± 0% -2.29% (p=0.000 n=10+9) AnchoredLongMatch-12 268ns ± 1% 252ns ± 1% -6.04% (p=0.000 n=10+10) OnePassShortA-12 614ns ± 0% 587ns ± 1% -4.33% (p=0.000 n=6+10) NotOnePassShortA-12 552ns ± 0% 547ns ± 1% -0.89% (p=0.000 n=10+10) OnePassShortB-12 494ns ± 0% 455ns ± 0% -7.96% (p=0.000 n=9+9) NotOnePassShortB-12 411ns ± 0% 406ns ± 0% -1.30% (p=0.000 n=9+9) OnePassLongPrefix-12 109ns ± 0% 108ns ± 1% ~ (p=0.064 n=8+9) OnePassLongNotPrefix-12 403ns ± 0% 349ns ± 0% -13.30% (p=0.000 n=9+8) MatchParallelShared-12 38.9ns ± 1% 37.9ns ± 1% -2.65% (p=0.000 n=10+8) MatchParallelCopied-12 39.2ns ± 1% 38.3ns ± 2% -2.20% (p=0.001 n=10+10) QuoteMetaAll-12 94.5ns ± 0% 94.7ns ± 0% +0.18% (p=0.043 n=10+9) QuoteMetaNone-12 52.7ns ± 0% 52.7ns ± 0% ~ (all equal) Match/Easy0/32-12 72.2ns ± 0% 71.9ns ± 0% -0.38% (p=0.009 n=8+10) Match/Easy0/1K-12 296ns ± 1% 297ns ± 0% +0.51% (p=0.001 n=10+9) Match/Easy0/32K-12 4.57µs ± 3% 4.61µs ± 2% ~ (p=0.280 n=10+10) Match/Easy0/1M-12 234µs ± 0% 234µs ± 0% ~ (p=0.986 n=10+10) Match/Easy0/32M-12 7.96ms ± 0% 7.98ms ± 0% +0.22% (p=0.010 n=10+9) Match/Easy0i/32-12 1.09µs ± 0% 1.10µs ± 0% +0.23% (p=0.000 n=8+9) Match/Easy0i/1K-12 31.7µs ± 0% 31.7µs ± 0% +0.09% (p=0.003 n=9+8) Match/Easy0i/32K-12 1.61ms ± 0% 1.27ms ± 1% -21.03% (p=0.000 n=8+10) Match/Easy0i/1M-12 51.4ms ± 0% 40.4ms ± 0% -21.29% (p=0.000 n=8+8) Match/Easy0i/32M-12 1.65s ± 0% 1.30s ± 1% -21.22% (p=0.000 n=9+9) Match/Easy1/32-12 67.6ns ± 1% 67.2ns ± 0% ~ (p=0.085 n=10+9) Match/Easy1/1K-12 873ns ± 2% 880ns ± 0% +0.78% (p=0.006 n=9+7) Match/Easy1/32K-12 39.7µs ± 1% 34.3µs ± 3% -13.53% (p=0.000 n=10+10) Match/Easy1/1M-12 1.41ms ± 1% 1.19ms ± 3% -15.48% (p=0.000 n=10+10) Match/Easy1/32M-12 44.9ms ± 1% 38.0ms ± 2% -15.21% (p=0.000 n=10+10) Match/Medium/32-12 1.04µs ± 0% 1.03µs ± 0% -0.57% (p=0.000 n=9+9) Match/Medium/1K-12 31.2µs ± 0% 31.4µs ± 1% +0.61% (p=0.000 n=8+10) Match/Medium/32K-12 1.45ms ± 1% 1.20ms ± 0% -17.70% (p=0.000 n=10+8) Match/Medium/1M-12 46.4ms ± 0% 38.4ms ± 2% -17.32% (p=0.000 n=6+9) Match/Medium/32M-12 1.49s ± 1% 1.24s ± 1% -16.81% (p=0.000 n=10+10) Match/Hard/32-12 1.47µs ± 0% 1.47µs ± 0% -0.31% (p=0.000 n=9+10) Match/Hard/1K-12 44.5µs ± 1% 44.4µs ± 0% ~ (p=0.075 n=10+10) Match/Hard/32K-12 2.09ms ± 0% 1.78ms ± 7% -14.88% (p=0.000 n=8+10) Match/Hard/1M-12 67.8ms ± 5% 56.9ms ± 7% -16.05% (p=0.000 n=10+10) Match/Hard/32M-12 2.17s ± 5% 1.84s ± 6% -15.21% (p=0.000 n=10+10) Match/Hard1/32-12 7.89µs ± 0% 7.94µs ± 0% +0.61% (p=0.000 n=9+9) Match/Hard1/1K-12 246µs ± 0% 245µs ± 0% -0.30% (p=0.010 n=9+10) Match/Hard1/32K-12 8.93ms ± 0% 8.17ms ± 0% -8.44% (p=0.000 n=9+8) Match/Hard1/1M-12 286ms ± 0% 269ms ± 9% -5.66% (p=0.028 n=9+10) Match/Hard1/32M-12 9.16s ± 0% 8.61s ± 8% -5.98% (p=0.028 n=9+10) Match_onepass_regex/32-12 825ns ± 0% 712ns ± 0% -13.75% (p=0.000 n=8+8) Match_onepass_regex/1K-12 28.7µs ± 1% 19.8µs ± 0% -30.99% (p=0.000 n=9+8) Match_onepass_regex/32K-12 950µs ± 1% 628µs ± 0% -33.83% (p=0.000 n=9+8) Match_onepass_regex/1M-12 30.4ms ± 0% 20.1ms ± 0% -33.74% (p=0.000 n=9+8) Match_onepass_regex/32M-12 974ms ± 1% 646ms ± 0% -33.73% (p=0.000 n=9+8) CompileOnepass-12 4.60µs ± 0% 4.59µs ± 0% ~ (p=0.063 n=8+9) [Geo mean] 23.1µs 21.3µs -7.44% https://perf.golang.org/search?q=upload:20181004.4 Change-Id: I47cdd09f6dcde1d7c317080e9b4df42c7d0a8d24 Reviewed-on: https://go-review.googlesource.com/c/139782 Run-TryBot: Russ Cox <rsc@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org>
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Russ Cox authored
Now the machine struct is only used for NFA execution. Use global pools to cache machines instead of per-Regexp lists. Also eliminate some tail calls in NFA execution, to pay for the added overhead of sync.Pool. name old time/op new time/op delta Find-12 252ns ± 0% 252ns ± 0% ~ (p=1.000 n=10+10) FindAllNoMatches-12 134ns ± 1% 136ns ± 4% ~ (p=0.443 n=9+10) FindString-12 246ns ± 0% 246ns ± 0% -0.16% (p=0.046 n=10+8) FindSubmatch-12 333ns ± 2% 332ns ± 1% ~ (p=0.489 n=10+9) FindStringSubmatch-12 320ns ± 0% 321ns ± 1% +0.55% (p=0.005 n=10+9) Literal-12 91.1ns ± 0% 91.6ns ± 0% +0.55% (p=0.000 n=10+9) NotLiteral-12 1.45µs ± 0% 1.47µs ± 0% +0.82% (p=0.000 n=10+9) MatchClass-12 2.19µs ± 0% 2.15µs ± 0% -2.01% (p=0.000 n=9+10) MatchClass_InRange-12 2.09µs ± 0% 2.09µs ± 0% ~ (p=0.082 n=10+9) ReplaceAll-12 1.39µs ± 0% 1.40µs ± 0% +0.50% (p=0.000 n=10+10) AnchoredLiteralShortNonMatch-12 82.4ns ± 0% 83.5ns ± 0% +1.36% (p=0.000 n=8+9) AnchoredLiteralLongNonMatch-12 106ns ± 1% 101ns ± 0% -4.36% (p=0.000 n=10+10) AnchoredShortMatch-12 130ns ± 0% 131ns ± 0% +0.77% (p=0.000 n=9+10) AnchoredLongMatch-12 272ns ± 0% 268ns ± 1% -1.46% (p=0.000 n=8+10) OnePassShortA-12 615ns ± 0% 614ns ± 0% ~ (p=0.094 n=10+6) NotOnePassShortA-12 549ns ± 0% 552ns ± 0% +0.52% (p=0.000 n=9+10) OnePassShortB-12 494ns ± 0% 494ns ± 0% ~ (p=0.247 n=8+9) NotOnePassShortB-12 412ns ± 1% 411ns ± 0% ~ (p=0.625 n=10+9) OnePassLongPrefix-12 108ns ± 0% 109ns ± 0% +0.93% (p=0.000 n=10+8) OnePassLongNotPrefix-12 402ns ± 0% 403ns ± 0% +0.14% (p=0.041 n=8+9) MatchParallelShared-12 38.6ns ± 2% 38.9ns ± 1% ~ (p=0.172 n=9+10) MatchParallelCopied-12 39.4ns ± 7% 39.2ns ± 1% ~ (p=0.423 n=10+10) QuoteMetaAll-12 94.9ns ± 0% 94.5ns ± 0% -0.42% (p=0.000 n=9+10) QuoteMetaNone-12 52.7ns ± 0% 52.7ns ± 0% ~ (all equal) Match/Easy0/32-12 72.1ns ± 0% 72.2ns ± 0% ~ (p=0.435 n=9+8) Match/Easy0/1K-12 298ns ± 0% 296ns ± 1% -1.01% (p=0.000 n=8+10) Match/Easy0/32K-12 4.64µs ± 1% 4.57µs ± 3% -1.39% (p=0.030 n=10+10) Match/Easy0/1M-12 234µs ± 0% 234µs ± 0% ~ (p=0.971 n=10+10) Match/Easy0/32M-12 7.95ms ± 0% 7.96ms ± 0% ~ (p=0.278 n=9+10) Match/Easy0i/32-12 1.10µs ± 0% 1.09µs ± 0% -0.29% (p=0.000 n=9+8) Match/Easy0i/1K-12 31.8µs ± 1% 31.7µs ± 0% ~ (p=0.704 n=10+9) Match/Easy0i/32K-12 1.62ms ± 1% 1.61ms ± 0% -1.12% (p=0.000 n=10+8) Match/Easy0i/1M-12 51.8ms ± 0% 51.4ms ± 0% -0.84% (p=0.000 n=8+8) Match/Easy0i/32M-12 1.65s ± 0% 1.65s ± 0% -0.46% (p=0.000 n=9+9) Match/Easy1/32-12 67.7ns ± 1% 67.6ns ± 1% ~ (p=0.723 n=10+10) Match/Easy1/1K-12 873ns ± 0% 873ns ± 2% ~ (p=0.345 n=10+9) Match/Easy1/32K-12 39.4µs ± 0% 39.7µs ± 1% +0.66% (p=0.000 n=10+10) Match/Easy1/1M-12 1.39ms ± 0% 1.41ms ± 1% +1.10% (p=0.000 n=10+10) Match/Easy1/32M-12 44.3ms ± 0% 44.9ms ± 1% +1.18% (p=0.000 n=10+10) Match/Medium/32-12 1.04µs ± 0% 1.04µs ± 0% -0.58% (p=0.000 n=9+9) Match/Medium/1K-12 31.4µs ± 0% 31.2µs ± 0% -0.62% (p=0.000 n=8+8) Match/Medium/32K-12 1.45ms ± 0% 1.45ms ± 1% ~ (p=0.356 n=9+10) Match/Medium/1M-12 46.4ms ± 0% 46.4ms ± 0% ~ (p=0.142 n=8+6) Match/Medium/32M-12 1.49s ± 1% 1.49s ± 1% ~ (p=0.739 n=10+10) Match/Hard/32-12 1.48µs ± 0% 1.47µs ± 0% -0.53% (p=0.000 n=9+9) Match/Hard/1K-12 45.0µs ± 1% 44.5µs ± 1% -1.06% (p=0.000 n=10+10) Match/Hard/32K-12 2.24ms ± 0% 2.09ms ± 0% -6.56% (p=0.000 n=8+8) Match/Hard/1M-12 71.6ms ± 0% 67.8ms ± 5% -5.36% (p=0.000 n=7+10) Match/Hard/32M-12 2.29s ± 0% 2.17s ± 5% -5.40% (p=0.000 n=9+10) Match/Hard1/32-12 7.89µs ± 0% 7.89µs ± 0% ~ (p=0.053 n=9+9) Match/Hard1/1K-12 244µs ± 0% 246µs ± 0% +0.71% (p=0.000 n=10+9) Match/Hard1/32K-12 10.3ms ± 0% 8.9ms ± 0% -13.76% (p=0.000 n=10+9) Match/Hard1/1M-12 331ms ± 0% 286ms ± 0% -13.72% (p=0.000 n=9+9) Match/Hard1/32M-12 10.6s ± 0% 9.2s ± 0% -13.72% (p=0.000 n=10+9) Match_onepass_regex/32-12 830ns ± 0% 825ns ± 0% -0.57% (p=0.000 n=9+8) Match_onepass_regex/1K-12 28.7µs ± 1% 28.7µs ± 1% -0.22% (p=0.040 n=9+9) Match_onepass_regex/32K-12 949µs ± 0% 950µs ± 1% ~ (p=0.236 n=8+9) Match_onepass_regex/1M-12 30.4ms ± 0% 30.4ms ± 0% ~ (p=0.059 n=8+9) Match_onepass_regex/32M-12 973ms ± 0% 974ms ± 1% ~ (p=0.258 n=9+9) CompileOnepass-12 4.64µs ± 0% 4.60µs ± 0% -0.90% (p=0.000 n=10+8) [Geo mean] 23.3µs 23.1µs -1.16% https://perf.golang.org/search?q=upload:20181004.3 Change-Id: I46f3d52ce89c8cd992cf554473c27af81fd81bfd Reviewed-on: https://go-review.googlesource.com/c/139781 Run-TryBot: Russ Cox <rsc@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org>
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Russ Cox authored
This allows the one-pass executions to have their own pool of (much smaller) allocated structures. A step toward eliminating the per-Regexp machine cache. Not much effect on benchmarks, since there are no optimizations here, and pools are a tiny bit slower than a locked data structure for single-threaded code. name old time/op new time/op delta Find-12 254ns ± 0% 252ns ± 0% -0.94% (p=0.000 n=9+10) FindAllNoMatches-12 135ns ± 0% 134ns ± 1% -0.49% (p=0.002 n=9+9) FindString-12 247ns ± 0% 246ns ± 0% -0.24% (p=0.003 n=8+10) FindSubmatch-12 334ns ± 0% 333ns ± 2% ~ (p=0.283 n=10+10) FindStringSubmatch-12 321ns ± 0% 320ns ± 0% -0.51% (p=0.000 n=9+10) Literal-12 92.2ns ± 0% 91.1ns ± 0% -1.25% (p=0.000 n=9+10) NotLiteral-12 1.47µs ± 0% 1.45µs ± 0% -0.99% (p=0.000 n=9+10) MatchClass-12 2.17µs ± 0% 2.19µs ± 0% +0.84% (p=0.000 n=7+9) MatchClass_InRange-12 2.13µs ± 0% 2.09µs ± 0% -1.70% (p=0.000 n=10+10) ReplaceAll-12 1.39µs ± 0% 1.39µs ± 0% +0.51% (p=0.000 n=10+10) AnchoredLiteralShortNonMatch-12 83.2ns ± 0% 82.4ns ± 0% -0.96% (p=0.000 n=8+8) AnchoredLiteralLongNonMatch-12 105ns ± 0% 106ns ± 1% ~ (p=0.087 n=10+10) AnchoredShortMatch-12 131ns ± 0% 130ns ± 0% -0.76% (p=0.000 n=10+9) AnchoredLongMatch-12 267ns ± 0% 272ns ± 0% +2.01% (p=0.000 n=10+8) OnePassShortA-12 611ns ± 0% 615ns ± 0% +0.61% (p=0.000 n=9+10) NotOnePassShortA-12 552ns ± 0% 549ns ± 0% -0.46% (p=0.000 n=8+9) OnePassShortB-12 491ns ± 0% 494ns ± 0% +0.61% (p=0.000 n=8+8) NotOnePassShortB-12 412ns ± 0% 412ns ± 1% ~ (p=0.151 n=9+10) OnePassLongPrefix-12 112ns ± 0% 108ns ± 0% -3.57% (p=0.000 n=10+10) OnePassLongNotPrefix-12 410ns ± 0% 402ns ± 0% -1.95% (p=0.000 n=9+8) MatchParallelShared-12 38.8ns ± 1% 38.6ns ± 2% ~ (p=0.536 n=10+9) MatchParallelCopied-12 39.2ns ± 3% 39.4ns ± 7% ~ (p=0.986 n=10+10) QuoteMetaAll-12 94.6ns ± 0% 94.9ns ± 0% +0.29% (p=0.001 n=8+9) QuoteMetaNone-12 52.7ns ± 0% 52.7ns ± 0% ~ (all equal) Match/Easy0/32-12 72.9ns ± 0% 72.1ns ± 0% -1.07% (p=0.000 n=9+9) Match/Easy0/1K-12 298ns ± 0% 298ns ± 0% ~ (p=0.140 n=6+8) Match/Easy0/32K-12 4.60µs ± 2% 4.64µs ± 1% ~ (p=0.171 n=10+10) Match/Easy0/1M-12 235µs ± 0% 234µs ± 0% -0.14% (p=0.004 n=10+10) Match/Easy0/32M-12 7.96ms ± 0% 7.95ms ± 0% -0.12% (p=0.043 n=10+9) Match/Easy0i/32-12 1.09µs ± 0% 1.10µs ± 0% +0.15% (p=0.000 n=8+9) Match/Easy0i/1K-12 31.7µs ± 0% 31.8µs ± 1% ~ (p=0.905 n=9+10) Match/Easy0i/32K-12 1.61ms ± 0% 1.62ms ± 1% +1.12% (p=0.000 n=9+10) Match/Easy0i/1M-12 51.4ms ± 0% 51.8ms ± 0% +0.85% (p=0.000 n=8+8) Match/Easy0i/32M-12 1.65s ± 1% 1.65s ± 0% ~ (p=0.113 n=9+9) Match/Easy1/32-12 67.9ns ± 0% 67.7ns ± 1% ~ (p=0.232 n=8+10) Match/Easy1/1K-12 884ns ± 0% 873ns ± 0% -1.29% (p=0.000 n=9+10) Match/Easy1/32K-12 39.2µs ± 0% 39.4µs ± 0% +0.50% (p=0.000 n=9+10) Match/Easy1/1M-12 1.39ms ± 0% 1.39ms ± 0% +0.29% (p=0.000 n=9+10) Match/Easy1/32M-12 44.2ms ± 1% 44.3ms ± 0% +0.21% (p=0.029 n=10+10) Match/Medium/32-12 1.05µs ± 0% 1.04µs ± 0% -0.27% (p=0.001 n=8+9) Match/Medium/1K-12 31.3µs ± 0% 31.4µs ± 0% +0.39% (p=0.000 n=9+8) Match/Medium/32K-12 1.45ms ± 0% 1.45ms ± 0% +0.33% (p=0.000 n=8+9) Match/Medium/1M-12 46.2ms ± 0% 46.4ms ± 0% +0.35% (p=0.000 n=9+8) Match/Medium/32M-12 1.48s ± 0% 1.49s ± 1% +0.70% (p=0.000 n=8+10) Match/Hard/32-12 1.49µs ± 0% 1.48µs ± 0% -0.43% (p=0.000 n=10+9) Match/Hard/1K-12 45.1µs ± 1% 45.0µs ± 1% ~ (p=0.393 n=10+10) Match/Hard/32K-12 2.18ms ± 1% 2.24ms ± 0% +2.71% (p=0.000 n=9+8) Match/Hard/1M-12 69.7ms ± 1% 71.6ms ± 0% +2.76% (p=0.000 n=9+7) Match/Hard/32M-12 2.23s ± 1% 2.29s ± 0% +2.65% (p=0.000 n=9+9) Match/Hard1/32-12 7.89µs ± 0% 7.89µs ± 0% ~ (p=0.286 n=9+9) Match/Hard1/1K-12 244µs ± 0% 244µs ± 0% ~ (p=0.905 n=9+10) Match/Hard1/32K-12 10.3ms ± 0% 10.3ms ± 0% ~ (p=0.796 n=10+10) Match/Hard1/1M-12 331ms ± 0% 331ms ± 0% ~ (p=0.167 n=8+9) Match/Hard1/32M-12 10.6s ± 0% 10.6s ± 0% ~ (p=0.315 n=8+10) Match_onepass_regex/32-12 812ns ± 0% 830ns ± 0% +2.19% (p=0.000 n=10+9) Match_onepass_regex/1K-12 28.5µs ± 0% 28.7µs ± 1% +0.97% (p=0.000 n=10+9) Match_onepass_regex/32K-12 936µs ± 0% 949µs ± 0% +1.43% (p=0.000 n=10+8) Match_onepass_regex/1M-12 30.2ms ± 0% 30.4ms ± 0% +0.62% (p=0.000 n=10+8) Match_onepass_regex/32M-12 970ms ± 0% 973ms ± 0% +0.35% (p=0.000 n=10+9) CompileOnepass-12 4.63µs ± 1% 4.64µs ± 0% ~ (p=0.060 n=10+10) [Geo mean] 23.3µs 23.3µs +0.12% https://perf.golang.org/search?q=upload:20181004.2 Change-Id: Iff9e9f9d4a4698162126a2f300e8ed1b1a39361e Reviewed-on: https://go-review.googlesource.com/c/139780 Run-TryBot: Russ Cox <rsc@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org>
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Russ Cox authored
This allows the bit-state executions to have their own pool of allocated structures. A step toward eliminating the per-Regexp machine cache. Note especially the -92% on MatchParallelShared. This is real but not a complete story: the other execution engines still need to be de-shared, but the benchmark was only using bit-state. The tiny slowdowns in unrelated code are noise. name old time/op new time/op delta Find-12 264ns ± 3% 254ns ± 0% -3.86% (p=0.000 n=10+9) FindAllNoMatches-12 140ns ± 2% 135ns ± 0% -3.91% (p=0.000 n=10+9) FindString-12 256ns ± 0% 247ns ± 0% -3.52% (p=0.000 n=8+8) FindSubmatch-12 339ns ± 1% 334ns ± 0% -1.41% (p=0.000 n=9+10) FindStringSubmatch-12 322ns ± 0% 321ns ± 0% -0.21% (p=0.005 n=8+9) Literal-12 100ns ± 2% 92ns ± 0% -8.10% (p=0.000 n=10+9) NotLiteral-12 1.50µs ± 0% 1.47µs ± 0% -1.91% (p=0.000 n=8+9) MatchClass-12 2.18µs ± 0% 2.17µs ± 0% -0.20% (p=0.001 n=10+7) MatchClass_InRange-12 2.12µs ± 0% 2.13µs ± 0% +0.23% (p=0.000 n=10+10) ReplaceAll-12 1.41µs ± 0% 1.39µs ± 0% -1.30% (p=0.000 n=7+10) AnchoredLiteralShortNonMatch-12 89.8ns ± 0% 83.2ns ± 0% -7.35% (p=0.000 n=8+8) AnchoredLiteralLongNonMatch-12 105ns ± 3% 105ns ± 0% ~ (p=0.186 n=10+10) AnchoredShortMatch-12 141ns ± 0% 131ns ± 0% -7.09% (p=0.000 n=9+10) AnchoredLongMatch-12 276ns ± 4% 267ns ± 0% -3.23% (p=0.000 n=10+10) OnePassShortA-12 620ns ± 0% 611ns ± 0% -1.39% (p=0.000 n=10+9) NotOnePassShortA-12 575ns ± 3% 552ns ± 0% -3.97% (p=0.000 n=10+8) OnePassShortB-12 493ns ± 0% 491ns ± 0% -0.33% (p=0.000 n=8+8) NotOnePassShortB-12 423ns ± 0% 412ns ± 0% -2.60% (p=0.000 n=8+9) OnePassLongPrefix-12 112ns ± 0% 112ns ± 0% ~ (all equal) OnePassLongNotPrefix-12 405ns ± 0% 410ns ± 0% +1.23% (p=0.000 n=8+9) MatchParallelShared-12 501ns ± 1% 39ns ± 1% -92.27% (p=0.000 n=10+10) MatchParallelCopied-12 39.1ns ± 0% 39.2ns ± 3% ~ (p=0.785 n=6+10) QuoteMetaAll-12 94.6ns ± 0% 94.6ns ± 0% ~ (p=0.439 n=10+8) QuoteMetaNone-12 52.7ns ± 0% 52.7ns ± 0% ~ (all equal) Match/Easy0/32-12 79.1ns ± 0% 72.9ns ± 0% -7.85% (p=0.000 n=9+9) Match/Easy0/1K-12 307ns ± 1% 298ns ± 0% -2.99% (p=0.000 n=10+6) Match/Easy0/32K-12 4.65µs ± 2% 4.60µs ± 2% ~ (p=0.159 n=10+10) Match/Easy0/1M-12 234µs ± 0% 235µs ± 0% +0.17% (p=0.003 n=10+10) Match/Easy0/32M-12 7.98ms ± 1% 7.96ms ± 0% ~ (p=0.278 n=9+10) Match/Easy0i/32-12 1.13µs ± 1% 1.09µs ± 0% -3.24% (p=0.000 n=9+8) Match/Easy0i/1K-12 32.5µs ± 0% 31.7µs ± 0% -2.66% (p=0.000 n=9+9) Match/Easy0i/32K-12 1.59ms ± 0% 1.61ms ± 0% +0.75% (p=0.000 n=9+9) Match/Easy0i/1M-12 51.0ms ± 0% 51.4ms ± 0% +0.77% (p=0.000 n=10+8) Match/Easy0i/32M-12 1.63s ± 0% 1.65s ± 1% +1.24% (p=0.000 n=7+9) Match/Easy1/32-12 75.1ns ± 1% 67.9ns ± 0% -9.54% (p=0.000 n=8+8) Match/Easy1/1K-12 861ns ± 0% 884ns ± 0% +2.71% (p=0.000 n=8+9) Match/Easy1/32K-12 39.2µs ± 1% 39.2µs ± 0% ~ (p=0.090 n=10+9) Match/Easy1/1M-12 1.38ms ± 0% 1.39ms ± 0% ~ (p=0.095 n=10+9) Match/Easy1/32M-12 44.2ms ± 1% 44.2ms ± 1% ~ (p=0.218 n=10+10) Match/Medium/32-12 1.04µs ± 1% 1.05µs ± 0% +1.05% (p=0.000 n=9+8) Match/Medium/1K-12 31.3µs ± 0% 31.3µs ± 0% -0.14% (p=0.004 n=9+9) Match/Medium/32K-12 1.44ms ± 0% 1.45ms ± 0% +0.18% (p=0.001 n=8+8) Match/Medium/1M-12 46.1ms ± 0% 46.2ms ± 0% +0.13% (p=0.003 n=6+9) Match/Medium/32M-12 1.48s ± 0% 1.48s ± 0% +0.20% (p=0.002 n=9+8) Match/Hard/32-12 1.54µs ± 1% 1.49µs ± 0% -3.60% (p=0.000 n=9+10) Match/Hard/1K-12 46.4µs ± 1% 45.1µs ± 1% -2.78% (p=0.000 n=9+10) Match/Hard/32K-12 2.19ms ± 0% 2.18ms ± 1% -0.51% (p=0.006 n=8+9) Match/Hard/1M-12 70.1ms ± 0% 69.7ms ± 1% -0.52% (p=0.006 n=8+9) Match/Hard/32M-12 2.24s ± 0% 2.23s ± 1% -0.42% (p=0.046 n=8+9) Match/Hard1/32-12 8.17µs ± 1% 7.89µs ± 0% -3.42% (p=0.000 n=8+9) Match/Hard1/1K-12 254µs ± 2% 244µs ± 0% -3.91% (p=0.000 n=9+9) Match/Hard1/32K-12 9.58ms ± 1% 10.35ms ± 0% +8.00% (p=0.000 n=10+10) Match/Hard1/1M-12 306ms ± 1% 331ms ± 0% +8.27% (p=0.000 n=9+8) Match/Hard1/32M-12 9.79s ± 1% 10.60s ± 0% +8.29% (p=0.000 n=9+8) Match_onepass_regex/32-12 808ns ± 0% 812ns ± 0% +0.47% (p=0.000 n=8+10) Match_onepass_regex/1K-12 27.8µs ± 0% 28.5µs ± 0% +2.32% (p=0.000 n=8+10) Match_onepass_regex/32K-12 925µs ± 0% 936µs ± 0% +1.24% (p=0.000 n=9+10) Match_onepass_regex/1M-12 29.5ms ± 0% 30.2ms ± 0% +2.38% (p=0.000 n=10+10) Match_onepass_regex/32M-12 945ms ± 0% 970ms ± 0% +2.60% (p=0.000 n=9+10) CompileOnepass-12 4.67µs ± 0% 4.63µs ± 1% -0.84% (p=0.000 n=10+10) [Geo mean] 24.5µs 23.3µs -5.04% https://perf.golang.org/search?q=upload:20181004.1 Change-Id: Idbc2b76223718265657819ff38be2d9aba1c54b4 Reviewed-on: https://go-review.googlesource.com/c/139779 Run-TryBot: Russ Cox <rsc@golang.org> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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- 01 Jun, 2018 1 commit
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Tim Cooper authored
Each URL was manually verified to ensure it did not serve up incorrect content. Change-Id: I4dc846227af95a73ee9a3074d0c379ff0fa955df Reviewed-on: https://go-review.googlesource.com/115798Reviewed-by:
Ian Lance Taylor <iant@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org>
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- 31 Oct, 2017 1 commit
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Daniel Martí authored
All of these had a return or break in the else body, so flipping the condition means we can unindent and simplify. Change-Id: If93e97504480d18a0dac3f2c8ffe57ab8bcb929c Reviewed-on: https://go-review.googlesource.com/74190 Run-TryBot: Daniel Martí <mvdan@mvdan.cc> Reviewed-by:
Ian Lance Taylor <iant@golang.org>
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- 15 Sep, 2017 1 commit
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Kunpei Sakai authored
a -> an Change-Id: I7362bdc199e83073a712be657f5d9ba16df3077e Reviewed-on: https://go-review.googlesource.com/63850Reviewed-by:
Rob Pike <r@golang.org>
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- 23 Mar, 2017 1 commit
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haya14busa authored
There were no allocations in regexp.Match for *non* onepass regex because m.matchcap length is reset to zero (ncap=0 for regexp.Match). But, as for onepass regex, m.matchcap length remains as it is even when ncap=0 and it leads needless allocations. benchmark old ns/op new ns/op delta BenchmarkMatch_onepass_regex/32-4 6465 4628 -28.41% BenchmarkMatch_onepass_regex/1K-4 208324 151558 -27.25% BenchmarkMatch_onepass_regex/32K-4 7230259 5834492 -19.30% BenchmarkMatch_onepass_regex/1M-4 234379810 166310682 -29.04% BenchmarkMatch_onepass_regex/32M-4 7903529363 4981119950 -36.98% benchmark old MB/s new MB/s speedup BenchmarkMatch_onepass_regex/32-4 4.95 6.91 1.40x BenchmarkMatch_onepass_regex/1K-4 4.92 6.76 1.37x BenchmarkMatch_onepass_regex/32K-4 4.53 5.62 1.24x BenchmarkMatch_onepass_regex/1M-4 4.47 6.30 1.41x BenchmarkMatch_onepass_regex/32M-4 4.25 6.74 1.59x benchmark old allocs new allocs delta BenchmarkMatch_onepass_regex/32-4 32 0 -100.00% BenchmarkMatch_onepass_regex/1K-4 1024 0 -100.00% BenchmarkMatch_onepass_regex/32K-4 32768 0 -100.00% BenchmarkMatch_onepass_regex/1M-4 1048576 0 -100.00% BenchmarkMatch_onepass_regex/32M-4 104559255 0 -100.00% benchmark old bytes new bytes delta BenchmarkMatch_onepass_regex/32-4 512 0 -100.00% BenchmarkMatch_onepass_regex/1K-4 16384 0 -100.00% BenchmarkMatch_onepass_regex/32K-4 524288 0 -100.00% BenchmarkMatch_onepass_regex/1M-4 16777216 0 -100.00% BenchmarkMatch_onepass_regex/32M-4 2019458128 0 -100.00% Fixes #19573 Change-Id: I033982d0003ebb0360bb40b92eb3941c781ec74d Reviewed-on: https://go-review.googlesource.com/38270 Run-TryBot: Michael Matloob <matloob@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org>
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- 06 Sep, 2016 1 commit
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Aliaksandr Valialkin authored
This improves Regexp.Find* and Regexp.ReplaceAll* speed: name old time/op new time/op delta Find-4 345ns ± 1% 314ns ± 1% -8.94% (p=0.000 n=9+8) FindString-4 341ns ± 1% 308ns ± 0% -9.85% (p=0.000 n=10+9) FindSubmatch-4 440ns ± 1% 404ns ± 0% -8.27% (p=0.000 n=10+8) FindStringSubmatch-4 426ns ± 0% 387ns ± 0% -9.07% (p=0.000 n=10+9) ReplaceAll-4 1.75µs ± 1% 1.67µs ± 0% -4.45% (p=0.000 n=9+10) name old alloc/op new alloc/op delta Find-4 16.0B ± 0% 0.0B ±NaN% -100.00% (p=0.000 n=10+10) FindString-4 16.0B ± 0% 0.0B ±NaN% -100.00% (p=0.000 n=10+10) FindSubmatch-4 80.0B ± 0% 48.0B ± 0% -40.00% (p=0.000 n=10+10) FindStringSubmatch-4 64.0B ± 0% 32.0B ± 0% -50.00% (p=0.000 n=10+10) ReplaceAll-4 152B ± 0% 104B ± 0% -31.58% (p=0.000 n=10+10) name old allocs/op new allocs/op delta Find-4 1.00 ± 0% 0.00 ±NaN% -100.00% (p=0.000 n=10+10) FindString-4 1.00 ± 0% 0.00 ±NaN% -100.00% (p=0.000 n=10+10) FindSubmatch-4 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) FindStringSubmatch-4 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) ReplaceAll-4 8.00 ± 0% 5.00 ± 0% -37.50% (p=0.000 n=10+10) Fixes #15643 Change-Id: I594fe51172373e2adb98d1d25c76ca2cde54ff48 Reviewed-on: https://go-review.googlesource.com/23030Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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- 25 Mar, 2016 1 commit
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Dominik Honnef authored
This change removes a lot of dead code. Some of the code has never been used, not even when it was first commited. The rest shouldn't have survived refactors. This change doesn't remove unused routines helpful for debugging, nor does it remove code that's used in commented out blocks of code that are only unused temporarily. Furthermore, unused constants weren't removed when they were part of a set of constants from specifications. One noteworthy omission from this CL are about 1000 lines of unused code in cmd/fix, 700 lines of which are the typechecker, which hasn't been used ever since the pre-Go 1 fixes have been removed. I wasn't sure if this code should stick around for future uses of cmd/fix or be culled as well. Change-Id: Ib714bc7e487edc11ad23ba1c3222d1fd02e4a549 Reviewed-on: https://go-review.googlesource.com/20926Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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- 02 Mar, 2016 1 commit
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Brad Fitzpatrick authored
The tree's pretty inconsistent about single space vs double space after a period in documentation. Make it consistently a single space, per earlier decisions. This means contributors won't be confused by misleading precedence. This CL doesn't use go/doc to parse. It only addresses // comments. It was generated with: $ perl -i -npe 's,^(\s*// .+[a-z]\.) +([A-Z]),$1 $2,' $(git grep -l -E '^\s*//(.+\.) +([A-Z])') $ go test go/doc -update Change-Id: Iccdb99c37c797ef1f804a94b22ba5ee4b500c4f7 Reviewed-on: https://go-review.googlesource.com/20022Reviewed-by:
Rob Pike <r@golang.org> Reviewed-by:
Dave Day <djd@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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- 23 Mar, 2015 1 commit
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Michael Matloob authored
This is a port of RE2's bitstate backtracker, which triggers under the same conditions that the RE2 backtracker triggers. However I wasn't sure how to port over some of the optimizations in the RE2 backtracker, and there is a ~2% penalty on benchmarks that don't trigger the backtracker. benchmark old ns/op new ns/op delta BenchmarkLiteral 312 189 -39.42% BenchmarkNotLiteral 4435 3001 -32.33% BenchmarkMatchClass 5758 4378 -23.97% BenchmarkMatchClass_InRange 5385 4084 -24.16% BenchmarkReplaceAll 5291 3505 -33.76% BenchmarkAnchoredLiteralShortNonMatch 190 200 +5.26% BenchmarkAnchoredLiteralLongNonMatch 189 194 +2.65% BenchmarkAnchoredShortMatch 479 304 -36.53% BenchmarkAnchoredLongMatch 478 499 +4.39% BenchmarkOnePassShortA 791 798 +0.88% BenchmarkNotOnePassShortA 3202 1571 -50.94% BenchmarkOnePassShortB 614 633 +3.09% BenchmarkNotOnePassShortB 2685 881 -67.19% BenchmarkOnePassLongPrefix 152 154 +1.32% BenchmarkOnePassLongNotPrefix 505 533 +5.54% BenchmarkMatchEasy0_32 139 171 +23.02% BenchmarkMatchEasy0_1K 653 1797 +175.19% BenchmarkMatchEasy0_32K 12032 13346 +10.92% BenchmarkMatchEasy0_1M 462882 461272 -0.35% BenchmarkMatchEasy0_32M 15015339 15365238 +2.33% BenchmarkMatchEasy1_32 122 168 +37.70% BenchmarkMatchEasy1_1K 3339 2612 -21.77% BenchmarkMatchEasy1_32K 72330 71721 -0.84% BenchmarkMatchEasy1_1M 2545410 2652284 +4.20% BenchmarkMatchEasy1_32M 80072063 82609750 +3.17% BenchmarkMatchMedium_32 2359 1980 -16.07% BenchmarkMatchMedium_1K 75939 58593 -22.84% BenchmarkMatchMedium_32K 2450907 2501106 +2.05% BenchmarkMatchMedium_1M 78707697 80174418 +1.86% BenchmarkMatchMedium_32M 2535146010 2570896441 +1.41% BenchmarkMatchHard_32 4297 2960 -31.11% BenchmarkMatchHard_1K 133592 88997 -33.38% BenchmarkMatchHard_32K 4240445 4336907 +2.27% BenchmarkMatchHard_1M 136187006 139350238 +2.32% BenchmarkMatchHard_32M 4350855890 4478537306 +2.93% benchmark old MB/s new MB/s speedup BenchmarkMatchEasy0_32 228.74 186.11 0.81x BenchmarkMatchEasy0_1K 1565.91 569.64 0.36x BenchmarkMatchEasy0_32K 2723.31 2455.10 0.90x BenchmarkMatchEasy0_1M 2265.32 2273.22 1.00x BenchmarkMatchEasy0_32M 2234.68 2183.79 0.98x BenchmarkMatchEasy1_32 261.08 190.22 0.73x BenchmarkMatchEasy1_1K 306.59 391.91 1.28x BenchmarkMatchEasy1_32K 453.03 456.88 1.01x BenchmarkMatchEasy1_1M 411.95 395.35 0.96x BenchmarkMatchEasy1_32M 419.05 406.18 0.97x BenchmarkMatchMedium_32 13.56 16.16 1.19x BenchmarkMatchMedium_1K 13.48 17.48 1.30x BenchmarkMatchMedium_32K 13.37 13.10 0.98x BenchmarkMatchMedium_1M 13.32 13.08 0.98x BenchmarkMatchMedium_32M 13.24 13.05 0.99x BenchmarkMatchHard_32 7.45 10.81 1.45x BenchmarkMatchHard_1K 7.67 11.51 1.50x BenchmarkMatchHard_32K 7.73 7.56 0.98x BenchmarkMatchHard_1M 7.70 7.52 0.98x BenchmarkMatchHard_32M 7.71 7.49 0.97x Fixes #4154 Change-Id: Iff7fb9507f0872b320d08afc08679751ed1b28bc Reviewed-on: https://go-review.googlesource.com/2153Reviewed-by:
Russ Cox <rsc@golang.org>
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- 08 Sep, 2014 1 commit
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Russ Cox authored
Preparation was in CL 134570043. This CL contains only the effect of 'hg mv src/pkg/* src'. For more about the move, see golang.org/s/go14nopkg.
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- 28 May, 2014 1 commit
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Russ Cox authored
Update #8112 Hide one-pass regexp API. This means moving the code from regexp/syntax to regexp, but it avoids being locked into the specific API chosen for the implementation. It also removes a slice field from the syntax.Inst, which should avoid bloating the memory footprint of a non-one-pass regexp unnecessarily. LGTM=r R=golang-codereviews, r CC=golang-codereviews, iant https://golang.org/cl/98610046
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- 07 Mar, 2014 1 commit
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David Covert authored
This produces about a 2.3x speedup for patterns that can be handled this way. LGTM=rsc R=rsc CC=golang-codereviews https://golang.org/cl/13345046
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- 19 Jan, 2012 1 commit
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Olivier Duperray authored
R=golang-dev, r CC=golang-dev https://golang.org/cl/5554064
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- 07 Dec, 2011 1 commit
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Russ Cox authored
Matters most for small inputs, because there is no real work to amortize the allocation effort against. benchmark old ns/op new ns/op delta BenchmarkLiteral 613 473 -22.84% BenchmarkNotLiteral 4981 4931 -1.00% BenchmarkMatchClass 7289 7122 -2.29% BenchmarkMatchClass_InRange 6618 6663 +0.68% BenchmarkReplaceAll 7843 7233 -7.78% BenchmarkAnchoredLiteralShortNonMatch 329 228 -30.70% BenchmarkAnchoredLiteralLongNonMatch 322 228 -29.19% BenchmarkAnchoredShortMatch 838 715 -14.68% BenchmarkAnchoredLongMatch 824 715 -13.23% benchmark old MB/s new MB/s speedup BenchmarkMatchEasy0_32 119.73 196.61 1.64x BenchmarkMatchEasy0_1K 540.58 538.33 1.00x BenchmarkMatchEasy0_32K 732.57 714.00 0.97x BenchmarkMatchEasy0_1M 726.44 708.36 0.98x BenchmarkMatchEasy0_32M 707.77 691.45 0.98x BenchmarkMatchEasy1_32 102.12 136.11 1.33x BenchmarkMatchEasy1_1K 298.31 307.04 1.03x BenchmarkMatchEasy1_32K 273.56 274.43 1.00x BenchmarkMatchEasy1_1M 268.42 269.23 1.00x BenchmarkMatchEasy1_32M 266.15 267.34 1.00x BenchmarkMatchMedium_32 2.53 3.38 1.34x BenchmarkMatchMedium_1K 9.37 9.57 1.02x BenchmarkMatchMedium_32K 9.29 9.67 1.04x BenchmarkMatchMedium_1M 9.42 9.66 1.03x BenchmarkMatchMedium_32M 9.41 9.62 1.02x BenchmarkMatchHard_32 6.66 6.75 1.01x BenchmarkMatchHard_1K 6.81 6.85 1.01x BenchmarkMatchHard_32K 6.79 6.85 1.01x BenchmarkMatchHard_1M 6.82 6.83 1.00x BenchmarkMatchHard_32M 6.80 6.80 1.00x R=golang-dev, r CC=golang-dev https://golang.org/cl/5453076
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- 26 Oct, 2011 1 commit
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Russ Cox authored
Public API of syntax tree changes. R=golang-dev, r, gri CC=golang-dev https://golang.org/cl/5302046
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- 28 Sep, 2011 1 commit
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Russ Cox authored
MatchEasy0_1K 500000 4207 ns/op 243.35 MB/s MatchEasy0_1K_Old 500000 4625 ns/op 221.40 MB/s MatchEasy0_1M 500 3948932 ns/op 265.53 MB/s MatchEasy0_1M_Old 500 3943926 ns/op 265.87 MB/s MatchEasy0_32K 10000 122974 ns/op 266.46 MB/s MatchEasy0_32K_Old 10000 123270 ns/op 265.82 MB/s MatchEasy0_32M 10 127265400 ns/op 263.66 MB/s MatchEasy0_32M_Old 10 127123500 ns/op 263.95 MB/s MatchEasy1_1K 500000 5637 ns/op 181.63 MB/s MatchEasy1_1K_Old 10000 100690 ns/op 10.17 MB/s MatchEasy1_1M 200 7683150 ns/op 136.48 MB/s MatchEasy1_1M_Old 10 145774000 ns/op 7.19 MB/s MatchEasy1_32K 10000 239887 ns/op 136.60 MB/s MatchEasy1_32K_Old 500 4508182 ns/op 7.27 MB/s MatchEasy1_32M 10 247103500 ns/op 135.79 MB/s MatchEasy1_32M_Old 1 4660191000 ns/op 7.20 MB/s MatchMedium_1K 10000 160567 ns/op 6.38 MB/s MatchMedium_1K_Old 10000 158367 ns/op 6.47 MB/s MatchMedium_1M 10 162928000 ns/op 6.44 MB/s MatchMedium_1M_Old 10 159699200 ns/op 6.57 MB/s MatchMedium_32K 500 5090758 ns/op 6.44 MB/s MatchMedium_32K_Old 500 5005800 ns/op 6.55 MB/s MatchMedium_32M 1 5233973000 ns/op 6.41 MB/s MatchMedium_32M_Old 1 5109676000 ns/op 6.57 MB/s MatchHard_1K 10000 249087 ns/op 4.11 MB/s MatchHard_1K_Old 5000 364569 ns/op 2.81 MB/s MatchHard_1M 5 256050000 ns/op 4.10 MB/s MatchHard_1M_Old 5 372446400 ns/op 2.82 MB/s MatchHard_32K 200 7944525 ns/op 4.12 MB/s MatchHard_32K_Old 100 11609380 ns/op 2.82 MB/s MatchHard_32M 1 8144503000 ns/op 4.12 MB/s MatchHard_32M_Old 1 11885434000 ns/op 2.82 MB/s R=r, bradfitz CC=golang-dev https://golang.org/cl/5134049
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- 26 Sep, 2011 1 commit
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Russ Cox authored
R=golang-dev, r CC=golang-dev https://golang.org/cl/5127042
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- 08 Sep, 2011 1 commit
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Russ Cox authored
Not exposed in the API yet, but passes tests. R=r CC=golang-dev https://golang.org/cl/4967059
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- 07 Sep, 2011 1 commit
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Russ Cox authored
Also add exp/regexp to build (forgot before). At this point I am very confident in exp/regexp's behavior. It should be usable as a drop-in replacement for regexp now. Later CLs could introduce a CompilePOSIX to get at traditional POSIX ``extended regular expressions'' as in egrep and also an re.MatchLongest method to change the matching mode to leftmost longest instead of leftmost first. On the other hand, I expect very few people to use either. R=r, r, gustavo CC=golang-dev https://golang.org/cl/4990041
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- 24 Jul, 2011 1 commit
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Russ Cox authored
Still need to write tests for new syntax and fix bugs that the tests find, but this is a good check point. All tests pass. Compared against existing regexp: benchmark old ns/op new ns/op delta regexp.BenchmarkLiteral 1869 620 -66.83% regexp.BenchmarkNotLiteral 9489 7823 -17.56% regexp.BenchmarkMatchClass 10372 8386 -19.15% regexp.BenchmarkMatchClass_InRange 10800 7750 -28.24% regexp.BenchmarkReplaceAll 13492 8519 -36.86% regexp.BenchmarkAnchoredLiteralShortNonMatch 747 339 -54.62% regexp.BenchmarkAnchoredLiteralLongNonMatch 599 335 -44.07% regexp.BenchmarkAnchoredShortMatch 2137 917 -57.09% regexp.BenchmarkAnchoredLongMatch 2029 917 -54.81% R=r, r CC=golang-dev, sam.thorogood https://golang.org/cl/4820046
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