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1ae67965e4
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Ilya Tocar 1ae67965e4 regexp: make (*bitState).push inlinable 
By refactoring job.arg from int with 0/1 as the only valid values into bool
and simplifying (*bitState).push, we reduce the number of nodes below the inlining threshold.
This improves backtracking regexp performance by 5-10% and go1 geomean  by 1.7%
Full performance data below:

name                                      old time/op    new time/op     delta
Find-6                                       510ns ± 0%      480ns ± 1%   -5.90%  (p=0.000 n=10+10)
FindString-6                                 504ns ± 1%      479ns ± 1%   -5.10%  (p=0.000 n=10+10)
FindSubmatch-6                               689ns ± 1%      659ns ± 1%   -4.27%  (p=0.000 n=9+10)
FindStringSubmatch-6                         659ns ± 0%      628ns ± 1%   -4.69%  (p=0.000 n=8+10)
Literal-6                                    174ns ± 1%      171ns ± 1%   -1.50%  (p=0.000 n=10+10)
NotLiteral-6                                2.89µs ± 1%     2.72µs ± 0%   -5.84%  (p=0.000 n=10+9)
MatchClass-6                                4.65µs ± 1%     4.28µs ± 1%   -7.96%  (p=0.000 n=10+10)
MatchClass_InRange-6                        4.15µs ± 1%     3.80µs ± 0%   -8.61%  (p=0.000 n=10+8)
ReplaceAll-6                                2.72µs ± 1%     2.60µs ± 1%   -4.68%  (p=0.000 n=10+10)
AnchoredLiteralShortNonMatch-6               158ns ± 1%      153ns ± 1%   -3.03%  (p=0.000 n=10+10)
AnchoredLiteralLongNonMatch-6                176ns ± 1%      176ns ± 0%     ~     (p=1.000 n=10+9)
AnchoredShortMatch-6                         260ns ± 0%      255ns ± 1%   -1.84%  (p=0.000 n=9+10)
AnchoredLongMatch-6                          456ns ± 0%      455ns ± 0%   -0.19%  (p=0.008 n=8+10)
OnePassShortA-6                             1.13µs ± 1%     1.12µs ± 0%   -0.57%  (p=0.046 n=10+8)
NotOnePassShortA-6                          1.14µs ± 1%     1.14µs ± 1%     ~     (p=0.162 n=10+10)
OnePassShortB-6                              908ns ± 0%      893ns ± 0%   -1.60%  (p=0.000 n=8+9)
NotOnePassShortB-6                           857ns ± 0%      803ns ± 1%   -6.34%  (p=0.000 n=8+10)
OnePassLongPrefix-6                          190ns ± 0%      190ns ± 1%     ~     (p=0.059 n=8+10)
OnePassLongNotPrefix-6                       722ns ± 1%      722ns ± 1%     ~     (p=0.451 n=10+10)
MatchParallelShared-6                        810ns ± 2%      807ns ± 2%     ~     (p=0.643 n=10+10)
MatchParallelCopied-6                       72.1ns ± 1%     69.4ns ± 1%   -3.81%  (p=0.000 n=10+10)
QuoteMetaAll-6                               213ns ± 2%      216ns ± 3%     ~     (p=0.284 n=10+10)
QuoteMetaNone-6                             89.7ns ± 1%     89.8ns ± 1%     ~     (p=0.616 n=10+10)
Match/Easy0/32-6                             127ns ± 1%      127ns ± 1%     ~     (p=0.977 n=10+10)
Match/Easy0/1K-6                             566ns ± 0%      566ns ± 0%     ~     (p=1.000 n=8+8)
Match/Easy0/32K-6                           9.30µs ± 1%     9.28µs ± 1%     ~     (p=0.529 n=10+10)
Match/Easy0/1M-6                             460µs ± 1%      460µs ± 1%     ~     (p=0.853 n=10+10)
Match/Easy0/32M-6                           15.0ms ± 0%     15.1ms ± 0%   +0.77%  (p=0.000 n=9+8)
Match/Easy0i/32-6                           2.10µs ± 1%     1.98µs ± 0%   -6.02%  (p=0.000 n=10+8)
Match/Easy0i/1K-6                           61.5µs ± 0%     57.2µs ± 0%   -6.97%  (p=0.000 n=10+9)
Match/Easy0i/32K-6                          2.75ms ± 0%     2.72ms ± 0%   -1.10%  (p=0.000 n=9+9)
Match/Easy0i/1M-6                           88.0ms ± 0%     86.9ms ± 1%   -1.29%  (p=0.000 n=8+10)
Match/Easy0i/32M-6                           2.82s ± 0%      2.77s ± 1%   -1.81%  (p=0.000 n=8+10)
Match/Easy1/32-6                             123ns ± 1%      124ns ± 1%   +0.90%  (p=0.001 n=10+10)
Match/Easy1/1K-6                            1.70µs ± 1%     1.65µs ± 0%   -3.18%  (p=0.000 n=9+10)
Match/Easy1/32K-6                           69.1µs ± 0%     68.4µs ± 1%   -0.95%  (p=0.000 n=8+10)
Match/Easy1/1M-6                            2.46ms ± 1%     2.42ms ± 1%   -1.66%  (p=0.000 n=10+10)
Match/Easy1/32M-6                           78.4ms ± 1%     77.5ms ± 0%   -1.08%  (p=0.000 n=10+9)
Match/Medium/32-6                           2.07µs ± 1%     1.91µs ± 1%   -7.69%  (p=0.000 n=10+10)
Match/Medium/1K-6                           62.8µs ± 0%     58.0µs ± 1%   -7.70%  (p=0.000 n=8+10)
Match/Medium/32K-6                          2.63ms ± 1%     2.58ms ± 1%   -2.14%  (p=0.000 n=10+10)
Match/Medium/1M-6                           84.6ms ± 0%     82.5ms ± 0%   -2.37%  (p=0.000 n=8+9)
Match/Medium/32M-6                           2.71s ± 0%      2.64s ± 0%   -2.46%  (p=0.000 n=10+9)
Match/Hard/32-6                             3.26µs ± 1%     2.98µs ± 1%   -8.49%  (p=0.000 n=10+10)
Match/Hard/1K-6                              100µs ± 0%       90µs ± 1%   -9.55%  (p=0.000 n=9+10)
Match/Hard/32K-6                            3.82ms ± 0%     3.82ms ± 1%     ~     (p=0.515 n=8+10)
Match/Hard/1M-6                              122ms ± 1%      123ms ± 0%   +0.66%  (p=0.000 n=10+8)
Match/Hard/32M-6                             3.89s ± 1%      3.91s ± 1%     ~     (p=0.105 n=10+10)
Match/Hard1/32-6                            18.1µs ± 1%     16.1µs ± 1%  -11.31%  (p=0.000 n=10+10)
Match/Hard1/1K-6                             565µs ± 0%      493µs ± 1%  -12.65%  (p=0.000 n=8+10)
Match/Hard1/32K-6                           18.8ms ± 0%     18.8ms ± 1%     ~     (p=0.905 n=9+10)
Match/Hard1/1M-6                             602ms ± 1%      602ms ± 1%     ~     (p=0.278 n=9+10)
Match/Hard1/32M-6                            19.1s ± 1%      19.2s ± 1%   +0.31%  (p=0.035 n=9+10)
Match_onepass_regex/32-6                    6.32µs ± 1%     6.34µs ± 1%     ~     (p=0.060 n=10+10)
Match_onepass_regex/1K-6                     204µs ± 1%      204µs ± 1%     ~     (p=0.842 n=9+10)
Match_onepass_regex/32K-6                   6.53ms ± 0%     6.55ms ± 1%   +0.36%  (p=0.005 n=10+10)
Match_onepass_regex/1M-6                     209ms ± 0%      208ms ± 1%   -0.65%  (p=0.034 n=8+10)
Match_onepass_regex/32M-6                    6.72s ± 0%      6.68s ± 1%   -0.74%  (p=0.000 n=9+10)
CompileOnepass/^(?:(?:(?:.(?:$))?))...-6    7.02µs ± 1%     7.02µs ± 1%     ~     (p=0.671 n=10+10)
CompileOnepass/^abcd$-6                     5.65µs ± 1%     5.65µs ± 1%     ~     (p=0.411 n=10+9)
CompileOnepass/^(?:(?:a{0,})*?)$-6          7.06µs ± 1%     7.06µs ± 1%     ~     (p=0.912 n=10+10)
CompileOnepass/^(?:(?:a+)*)$-6              6.40µs ± 1%     6.41µs ± 1%     ~     (p=0.699 n=10+10)
CompileOnepass/^(?:(?:a|(?:aa)))$-6         8.18µs ± 2%     8.16µs ± 1%     ~     (p=0.529 n=10+10)
CompileOnepass/^(?:[^\s\S])$-6              5.08µs ± 1%     5.17µs ± 1%   +1.77%  (p=0.000 n=9+10)
CompileOnepass/^(?:(?:(?:a*)+))$-6          6.86µs ± 1%     6.85µs ± 0%     ~     (p=0.190 n=10+9)
CompileOnepass/^[a-c]+$-6                   5.14µs ± 1%     5.11µs ± 0%   -0.53%  (p=0.041 n=10+10)
CompileOnepass/^[a-c]*$-6                   5.62µs ± 1%     5.63µs ± 1%     ~     (p=0.382 n=10+10)
CompileOnepass/^(?:a*)$-6                   5.76µs ± 1%     5.73µs ± 1%   -0.41%  (p=0.008 n=9+10)
CompileOnepass/^(?:(?:aa)|a)$-6             7.89µs ± 1%     7.84µs ± 1%   -0.66%  (p=0.020 n=10+10)
CompileOnepass/^...$-6                      5.38µs ± 1%     5.38µs ± 1%     ~     (p=0.857 n=9+10)
CompileOnepass/^(?:a|(?:aa))$-6             7.80µs ± 2%     7.82µs ± 1%     ~     (p=0.342 n=10+10)
CompileOnepass/^a((b))c$-6                  7.75µs ± 1%     7.78µs ± 1%     ~     (p=0.172 n=10+10)
CompileOnepass/^a.[l-nA-Cg-j]?e$-6          8.39µs ± 1%     8.42µs ± 1%     ~     (p=0.138 n=10+10)
CompileOnepass/^a((b))$-6                   6.92µs ± 1%     6.95µs ± 1%     ~     (p=0.159 n=10+10)
CompileOnepass/^a(?:(b)|(c))c$-6            10.0µs ± 1%     10.0µs ± 1%     ~     (p=0.896 n=10+10)
CompileOnepass/^a(?:b|c)$-6                 5.62µs ± 1%     5.66µs ± 1%   +0.71%  (p=0.023 n=10+10)
CompileOnepass/^a(?:b?|c)$-6                8.49µs ± 1%     8.43µs ± 1%   -0.69%  (p=0.010 n=10+10)
CompileOnepass/^a(?:b?|c+)$-6               9.26µs ± 1%     9.28µs ± 1%     ~     (p=0.448 n=10+10)
CompileOnepass/^a(?:bc)+$-6                 6.52µs ± 1%     6.46µs ± 2%   -1.02%  (p=0.003 n=10+10)
CompileOnepass/^a(?:[bcd])+$-6              6.29µs ± 1%     6.32µs ± 1%     ~     (p=0.256 n=10+10)
CompileOnepass/^a((?:[bcd])+)$-6            7.77µs ± 1%     7.79µs ± 1%     ~     (p=0.105 n=10+10)
CompileOnepass/^a(:?b|c)*d$-6               14.0µs ± 1%     13.9µs ± 1%   -0.69%  (p=0.003 n=10+10)
CompileOnepass/^.bc(d|e)*$-6                8.96µs ± 1%     9.06µs ± 1%   +1.20%  (p=0.000 n=10+9)
CompileOnepass/^loooooooooooooooooo...-6     219µs ± 1%      220µs ± 1%   +0.63%  (p=0.006 n=9+10)
[Geo mean]                                  31.6µs          31.1µs        -1.82%

name                                      old speed      new speed       delta
QuoteMetaAll-6                            65.5MB/s ± 2%   64.8MB/s ± 3%     ~     (p=0.315 n=10+10)
QuoteMetaNone-6                            290MB/s ± 1%    290MB/s ± 1%     ~     (p=0.755 n=10+10)
Match/Easy0/32-6                           250MB/s ± 0%    251MB/s ± 1%     ~     (p=0.277 n=8+9)
Match/Easy0/1K-6                          1.81GB/s ± 0%   1.81GB/s ± 0%     ~     (p=0.408 n=8+10)
Match/Easy0/32K-6                         3.52GB/s ± 1%   3.53GB/s ± 1%     ~     (p=0.529 n=10+10)
Match/Easy0/1M-6                          2.28GB/s ± 1%   2.28GB/s ± 1%     ~     (p=0.853 n=10+10)
Match/Easy0/32M-6                         2.24GB/s ± 0%   2.23GB/s ± 0%   -0.76%  (p=0.000 n=9+8)
Match/Easy0i/32-6                         15.2MB/s ± 1%   16.2MB/s ± 0%   +6.43%  (p=0.000 n=10+9)
Match/Easy0i/1K-6                         16.6MB/s ± 0%   17.9MB/s ± 0%   +7.48%  (p=0.000 n=10+9)
Match/Easy0i/32K-6                        11.9MB/s ± 0%   12.0MB/s ± 0%   +1.11%  (p=0.000 n=9+9)
Match/Easy0i/1M-6                         11.9MB/s ± 0%   12.1MB/s ± 1%   +1.31%  (p=0.000 n=8+10)
Match/Easy0i/32M-6                        11.9MB/s ± 0%   12.1MB/s ± 1%   +1.84%  (p=0.000 n=8+10)
Match/Easy1/32-6                           260MB/s ± 1%    258MB/s ± 1%   -0.91%  (p=0.001 n=10+10)
Match/Easy1/1K-6                           601MB/s ± 1%    621MB/s ± 0%   +3.28%  (p=0.000 n=9+10)
Match/Easy1/32K-6                          474MB/s ± 0%    479MB/s ± 1%   +0.96%  (p=0.000 n=8+10)
Match/Easy1/1M-6                           426MB/s ± 1%    433MB/s ± 1%   +1.68%  (p=0.000 n=10+10)
Match/Easy1/32M-6                          428MB/s ± 1%    433MB/s ± 0%   +1.09%  (p=0.000 n=10+9)
Match/Medium/32-6                         15.4MB/s ± 1%   16.7MB/s ± 1%   +8.23%  (p=0.000 n=10+9)
Match/Medium/1K-6                         16.3MB/s ± 1%   17.7MB/s ± 1%   +8.43%  (p=0.000 n=9+10)
Match/Medium/32K-6                        12.5MB/s ± 1%   12.7MB/s ± 1%   +2.15%  (p=0.000 n=10+10)
Match/Medium/1M-6                         12.4MB/s ± 0%   12.7MB/s ± 0%   +2.44%  (p=0.000 n=8+9)
Match/Medium/32M-6                        12.4MB/s ± 0%   12.7MB/s ± 0%   +2.52%  (p=0.000 n=10+9)
Match/Hard/32-6                           9.82MB/s ± 1%  10.73MB/s ± 1%   +9.29%  (p=0.000 n=10+10)
Match/Hard/1K-6                           10.2MB/s ± 0%   11.3MB/s ± 1%  +10.56%  (p=0.000 n=9+10)
Match/Hard/32K-6                          8.58MB/s ± 0%   8.58MB/s ± 1%     ~     (p=0.554 n=8+10)
Match/Hard/1M-6                           8.59MB/s ± 1%   8.53MB/s ± 0%   -0.70%  (p=0.000 n=10+8)
Match/Hard/32M-6                          8.62MB/s ± 1%   8.59MB/s ± 1%     ~     (p=0.098 n=10+10)
Match/Hard1/32-6                          1.77MB/s ± 1%   1.99MB/s ± 1%  +12.40%  (p=0.000 n=10+8)
Match/Hard1/1K-6                          1.81MB/s ± 1%   2.08MB/s ± 1%  +14.55%  (p=0.000 n=10+10)
Match/Hard1/32K-6                         1.74MB/s ± 0%   1.74MB/s ± 0%     ~     (p=0.108 n=9+10)
Match/Hard1/1M-6                          1.74MB/s ± 0%   1.74MB/s ± 1%     ~     (p=1.000 n=9+10)
Match/Hard1/32M-6                         1.75MB/s ± 0%   1.75MB/s ± 1%     ~     (p=0.157 n=9+10)
Match_onepass_regex/32-6                  5.05MB/s ± 0%   5.05MB/s ± 1%     ~     (p=0.262 n=8+10)
Match_onepass_regex/1K-6                  5.02MB/s ± 1%   5.02MB/s ± 1%     ~     (p=0.677 n=9+10)
Match_onepass_regex/32K-6                 5.02MB/s ± 0%   4.99MB/s ± 0%   -0.47%  (p=0.000 n=10+9)
Match_onepass_regex/1M-6                  5.01MB/s ± 0%   5.04MB/s ± 1%   +0.68%  (p=0.017 n=8+10)
Match_onepass_regex/32M-6                 4.99MB/s ± 0%   5.03MB/s ± 1%   +0.74%  (p=0.000 n=10+10)
[Geo mean]                                29.1MB/s        29.8MB/s        +2.44%

go1 data for reference

name                     old time/op    new time/op    delta
BinaryTree17-6              4.39s ± 1%     4.37s ± 0%   -0.58%  (p=0.006 n=9+9)
Fannkuch11-6                5.13s ± 0%     5.18s ± 0%   +0.87%  (p=0.000 n=8+8)
FmtFprintfEmpty-6          74.2ns ± 0%    71.7ns ± 3%   -3.41%  (p=0.000 n=10+10)
FmtFprintfString-6          120ns ± 1%     122ns ± 2%     ~     (p=0.333 n=10+10)
FmtFprintfInt-6             127ns ± 1%     127ns ± 1%     ~     (p=0.809 n=10+10)
FmtFprintfIntInt-6          186ns ± 0%     188ns ± 1%   +1.02%  (p=0.002 n=8+10)
FmtFprintfPrefixedInt-6     223ns ± 1%     222ns ± 2%     ~     (p=0.421 n=10+10)
FmtFprintfFloat-6           374ns ± 0%     376ns ± 1%   +0.43%  (p=0.030 n=8+10)
FmtManyArgs-6               795ns ± 0%     788ns ± 1%   -0.79%  (p=0.000 n=8+9)
GobDecode-6                10.9ms ± 1%    10.9ms ± 0%     ~     (p=0.079 n=10+9)
GobEncode-6                8.60ms ± 1%    8.56ms ± 0%   -0.52%  (p=0.004 n=10+10)
Gzip-6                      378ms ± 1%     386ms ± 1%   +2.28%  (p=0.000 n=10+10)
Gunzip-6                   63.7ms ± 0%    62.3ms ± 0%   -2.22%  (p=0.000 n=9+8)
HTTPClientServer-6          120µs ± 3%     114µs ± 3%   -4.99%  (p=0.000 n=10+10)
JSONEncode-6               20.3ms ± 1%    19.9ms ± 0%   -1.90%  (p=0.000 n=9+10)
JSONDecode-6               84.3ms ± 0%    83.7ms ± 0%   -0.76%  (p=0.000 n=8+8)
Mandelbrot200-6            6.91ms ± 0%    6.89ms ± 0%   -0.31%  (p=0.000 n=9+8)
GoParse-6                  5.49ms ± 0%    5.47ms ± 1%     ~     (p=0.101 n=8+10)
RegexpMatchEasy0_32-6       130ns ± 0%     128ns ± 0%   -1.54%  (p=0.002 n=8+10)
RegexpMatchEasy0_1K-6       322ns ± 1%     322ns ± 0%     ~     (p=0.525 n=10+9)
RegexpMatchEasy1_32-6       124ns ± 0%     124ns ± 0%   -0.32%  (p=0.046 n=8+10)
RegexpMatchEasy1_1K-6       570ns ± 0%     548ns ± 1%   -3.76%  (p=0.000 n=10+10)
RegexpMatchMedium_32-6      196ns ± 0%     183ns ± 1%   -6.61%  (p=0.000 n=8+10)
RegexpMatchMedium_1K-6     64.3µs ± 0%    59.0µs ± 1%   -8.31%  (p=0.000 n=8+10)
RegexpMatchHard_32-6       3.08µs ± 0%    2.80µs ± 0%   -8.96%  (p=0.000 n=8+9)
RegexpMatchHard_1K-6       93.0µs ± 0%    84.5µs ± 1%   -9.17%  (p=0.000 n=8+9)
Revcomp-6                   647ms ± 2%     646ms ± 1%     ~     (p=0.720 n=10+9)
Template-6                 92.3ms ± 0%    91.7ms ± 0%   -0.65%  (p=0.000 n=8+8)
TimeParse-6                 490ns ± 0%     488ns ± 0%   -0.43%  (p=0.000 n=10+10)
TimeFormat-6                513ns ± 0%     513ns ± 1%     ~     (p=0.144 n=9+10)
[Geo mean]                 79.1µs         77.7µs        -1.73%

name                     old speed      new speed      delta
GobDecode-6              70.1MB/s ± 1%  70.3MB/s ± 0%     ~     (p=0.078 n=10+9)
GobEncode-6              89.2MB/s ± 1%  89.7MB/s ± 0%   +0.52%  (p=0.004 n=10+10)
Gzip-6                   51.4MB/s ± 1%  50.2MB/s ± 1%   -2.23%  (p=0.000 n=10+10)
Gunzip-6                  304MB/s ± 0%   311MB/s ± 0%   +2.27%  (p=0.000 n=9+8)
JSONEncode-6             95.8MB/s ± 1%  97.7MB/s ± 0%   +1.93%  (p=0.000 n=9+10)
JSONDecode-6             23.0MB/s ± 0%  23.2MB/s ± 0%   +0.76%  (p=0.000 n=8+8)
GoParse-6                10.6MB/s ± 0%  10.6MB/s ± 1%     ~     (p=0.111 n=8+10)
RegexpMatchEasy0_32-6     244MB/s ± 0%   249MB/s ± 0%   +2.06%  (p=0.000 n=9+10)
RegexpMatchEasy0_1K-6    3.18GB/s ± 1%  3.17GB/s ± 0%     ~     (p=0.211 n=10+9)
RegexpMatchEasy1_32-6     257MB/s ± 0%   258MB/s ± 0%   +0.37%  (p=0.000 n=8+8)
RegexpMatchEasy1_1K-6    1.80GB/s ± 0%  1.87GB/s ± 1%   +3.91%  (p=0.000 n=10+10)
RegexpMatchMedium_32-6   5.08MB/s ± 0%  5.43MB/s ± 1%   +7.03%  (p=0.000 n=8+10)
RegexpMatchMedium_1K-6   15.9MB/s ± 0%  17.4MB/s ± 1%   +9.08%  (p=0.000 n=8+10)
RegexpMatchHard_32-6     10.4MB/s ± 0%  11.4MB/s ± 0%   +9.82%  (p=0.000 n=8+9)
RegexpMatchHard_1K-6     11.0MB/s ± 0%  12.1MB/s ± 1%  +10.10%  (p=0.000 n=8+9)
Revcomp-6                 393MB/s ± 2%   394MB/s ± 1%     ~     (p=0.720 n=10+9)
Template-6               21.0MB/s ± 0%  21.2MB/s ± 0%   +0.66%  (p=0.000 n=8+8)
[Geo mean]               74.2MB/s       76.2MB/s        +2.70%

Updates #21851

Change-Id: Ie88455db925f422a828f8528293790726a9c036b
Reviewed-on: https://go-review.googlesource.com/65491
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-25 19:34:26 +00:00
.github .github: update ISSUE_TEMPLATE to be closer to 'go bug' 2017-08-19 04:06:10 +00:00
api doc, api: add syscall.SysProcAttr.AmbientCaps change to 1.9 notes, API 2017-06-29 03:29:46 +00:00
doc spec: state which predeclared types are defined or alias types (clarification) 2017-09-19 14:33:25 +00:00
lib/time time: vendor tzdata-2017b and update test 2017-06-07 21:23:58 +00:00
misc cmd/compile: fix large global variables in -linkshared mode on s390x 2017-09-20 20:20:46 +00:00
src regexp: make (*bitState).push inlinable 2017-09-25 19:34:26 +00:00
test cmd/compile: fix invalid switch case value panic 2017-09-24 10:15:52 +00:00
.gitattributes
.gitignore .gitignore: include only Go project artifiacts 2017-08-15 21:37:05 +00:00
AUTHORS A+C: final updates for Go 1.9 2017-07-18 01:47:54 +00:00
CONTRIBUTING.md .github: recommend 'go bug' when filing an issue 2017-07-24 17:18:34 +00:00
CONTRIBUTORS A+C: final updates for Go 1.9 2017-07-18 01:47:54 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
LICENSE
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README.md readme: add attribution for the Gopher image 2017-02-03 19:39:41 +00:00
robots.txt

README.md

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

Gopher image 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.

Download and Install

Binary Distributions

Official binary distributions are available at https://golang.org/dl/.

After downloading a binary release, visit https://golang.org/doc/install or load doc/install.html in your web browser for installation instructions.

Install From Source

If a binary distribution is not available for your combination of operating system and architecture, visit https://golang.org/doc/install/source or load doc/install-source.html in your web browser for source installation instructions.

Contributing

Go is the work of hundreds of contributors. We appreciate your help!

To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html

Note that the Go project does not use GitHub pull requests, and that we use 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.