mirror of
https://github.com/golang/go
synced 2024-09-30 20:18:33 -06:00
8e25d4ccef
It's no longer necessary to maintain the bitmap of noscan objects
since we now use the span metadata to determine that they're noscan
instead of the bitmap.
The combined effect of segregating noscan spans and the follow-on
optimizations is roughly a 1% improvement in performance across the
go1 benchmarks and the x/benchmarks, with no increase in heap size.
Benchmark details: https://perf.golang.org/search?q=upload:20170420.1
name old time/op new time/op delta
Garbage/benchmem-MB=64-12 2.27ms ± 0% 2.25ms ± 1% -0.96% (p=0.000 n=15+18)
name old time/op new time/op delta
BinaryTree17-12 2.53s ± 2% 2.55s ± 1% +0.68% (p=0.001 n=17+16)
Fannkuch11-12 3.02s ± 0% 3.01s ± 0% -0.15% (p=0.000 n=16+16)
FmtFprintfEmpty-12 47.1ns ± 7% 47.0ns ± 5% ~ (p=0.886 n=20+17)
FmtFprintfString-12 73.6ns ± 3% 73.8ns ± 1% +0.30% (p=0.026 n=19+17)
FmtFprintfInt-12 80.3ns ± 2% 80.2ns ± 1% ~ (p=0.994 n=20+18)
FmtFprintfIntInt-12 124ns ± 0% 124ns ± 0% ~ (all samples are equal)
FmtFprintfPrefixedInt-12 172ns ± 1% 171ns ± 1% -0.72% (p=0.003 n=20+18)
FmtFprintfFloat-12 217ns ± 1% 216ns ± 1% -0.27% (p=0.019 n=18+19)
FmtManyArgs-12 490ns ± 1% 488ns ± 0% -0.36% (p=0.014 n=18+18)
GobDecode-12 6.71ms ± 1% 6.73ms ± 1% +0.42% (p=0.000 n=20+20)
GobEncode-12 5.25ms ± 0% 5.24ms ± 0% -0.20% (p=0.001 n=18+20)
Gzip-12 227ms ± 0% 226ms ± 1% ~ (p=0.107 n=20+19)
Gunzip-12 38.8ms ± 0% 38.8ms ± 0% ~ (p=0.221 n=19+18)
HTTPClientServer-12 75.4µs ± 1% 76.3µs ± 1% +1.26% (p=0.000 n=20+19)
JSONEncode-12 14.7ms ± 0% 14.7ms ± 1% -0.14% (p=0.002 n=18+17)
JSONDecode-12 57.6ms ± 0% 55.2ms ± 0% -4.13% (p=0.000 n=19+19)
Mandelbrot200-12 3.73ms ± 0% 3.73ms ± 0% -0.09% (p=0.000 n=19+17)
GoParse-12 3.18ms ± 1% 3.15ms ± 1% -0.90% (p=0.000 n=18+20)
RegexpMatchEasy0_32-12 73.3ns ± 2% 73.2ns ± 1% ~ (p=0.994 n=20+18)
RegexpMatchEasy0_1K-12 236ns ± 2% 234ns ± 1% -0.70% (p=0.002 n=19+17)
RegexpMatchEasy1_32-12 69.7ns ± 2% 69.9ns ± 2% ~ (p=0.416 n=20+20)
RegexpMatchEasy1_1K-12 366ns ± 1% 365ns ± 1% ~ (p=0.376 n=19+17)
RegexpMatchMedium_32-12 109ns ± 1% 108ns ± 1% ~ (p=0.461 n=17+18)
RegexpMatchMedium_1K-12 35.2µs ± 1% 35.2µs ± 3% ~ (p=0.238 n=19+20)
RegexpMatchHard_32-12 1.77µs ± 1% 1.77µs ± 1% +0.33% (p=0.007 n=17+16)
RegexpMatchHard_1K-12 53.2µs ± 0% 53.3µs ± 0% +0.26% (p=0.001 n=17+17)
Revcomp-12 1.13s ±117% 0.87s ±184% ~ (p=0.813 n=20+19)
Template-12 63.9ms ± 1% 64.6ms ± 1% +1.18% (p=0.000 n=19+20)
TimeParse-12 313ns ± 5% 312ns ± 0% ~ (p=0.114 n=20+19)
TimeFormat-12 336ns ± 0% 333ns ± 0% -0.97% (p=0.000 n=18+16)
[Geo mean] 50.6µs 50.1µs -1.04%
This is a cherry-pick of dev.garbage commit
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| .. | ||
| archive | ||
| bufio | ||
| builtin | ||
| bytes | ||
| cmd | ||
| compress | ||
| container | ||
| context | ||
| crypto | ||
| database/sql | ||
| debug | ||
| encoding | ||
| errors | ||
| expvar | ||
| flag | ||
| fmt | ||
| go | ||
| hash | ||
| html | ||
| image | ||
| index/suffixarray | ||
| internal | ||
| io | ||
| log | ||
| math | ||
| mime | ||
| net | ||
| os | ||
| path | ||
| plugin | ||
| reflect | ||
| regexp | ||
| runtime | ||
| sort | ||
| strconv | ||
| strings | ||
| sync | ||
| syscall | ||
| testing | ||
| text | ||
| time | ||
| unicode | ||
| unsafe | ||
| vendor/golang_org/x | ||
| all.bash | ||
| all.bat | ||
| all.rc | ||
| androidtest.bash | ||
| bootstrap.bash | ||
| buildall.bash | ||
| clean.bash | ||
| clean.bat | ||
| clean.rc | ||
| cmp.bash | ||
| iostest.bash | ||
| make.bash | ||
| make.bat | ||
| Make.dist | ||
| make.rc | ||
| naclmake.bash | ||
| nacltest.bash | ||
| race.bash | ||
| race.bat | ||
| run.bash | ||
| run.bat | ||
| run.rc | ||