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8f30d25168
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Rémy Oudompheng 8f30d25168 math/big: use nat pool to reduce allocations in mul and sqr 
This notably allows to reuse temporaries across
the karatsubaSqr recursion.

benchmark                    old ns/op     new ns/op     delta
BenchmarkNatMul/10-4         227           228           +0.44%
BenchmarkNatMul/100-4        8339          8589          +3.00%
BenchmarkNatMul/1000-4       313796        312272        -0.49%
BenchmarkNatMul/10000-4      11924720      11873589      -0.43%
BenchmarkNatMul/100000-4     503813354     503839058     +0.01%
BenchmarkNatSqr/20-4         549           513           -6.56%
BenchmarkNatSqr/30-4         945           874           -7.51%
BenchmarkNatSqr/50-4         1993          1832          -8.08%
BenchmarkNatSqr/80-4         4096          3874          -5.42%
BenchmarkNatSqr/100-4        6192          5712          -7.75%
BenchmarkNatSqr/200-4        20388         19543         -4.14%
BenchmarkNatSqr/300-4        38735         36715         -5.21%
BenchmarkNatSqr/500-4        99562         93542         -6.05%
BenchmarkNatSqr/800-4        195554        184907        -5.44%
BenchmarkNatSqr/1000-4       286302        275053        -3.93%
BenchmarkNatSqr/10000-4      9817057       9441641       -3.82%
BenchmarkNatSqr/100000-4     390713416     379696789     -2.82%

benchmark                    old allocs     new allocs     delta
BenchmarkNatMul/10-4         1              1              +0.00%
BenchmarkNatMul/100-4        1              1              +0.00%
BenchmarkNatMul/1000-4       2              1              -50.00%
BenchmarkNatMul/10000-4      2              1              -50.00%
BenchmarkNatMul/100000-4     9              11             +22.22%
BenchmarkNatSqr/20-4         2              1              -50.00%
BenchmarkNatSqr/30-4         2              1              -50.00%
BenchmarkNatSqr/50-4         2              1              -50.00%
BenchmarkNatSqr/80-4         2              1              -50.00%
BenchmarkNatSqr/100-4        2              1              -50.00%
BenchmarkNatSqr/200-4        2              1              -50.00%
BenchmarkNatSqr/300-4        4              1              -75.00%
BenchmarkNatSqr/500-4        4              1              -75.00%
BenchmarkNatSqr/800-4        10             1              -90.00%
BenchmarkNatSqr/1000-4       10             1              -90.00%
BenchmarkNatSqr/10000-4      731            1              -99.86%
BenchmarkNatSqr/100000-4     19687          6              -99.97%

benchmark                    old bytes     new bytes     delta
BenchmarkNatMul/10-4         192           192           +0.00%
BenchmarkNatMul/100-4        4864          4864          +0.00%
BenchmarkNatMul/1000-4       57344         49224         -14.16%
BenchmarkNatMul/10000-4      565248        498772        -11.76%
BenchmarkNatMul/100000-4     5749504       7263720       +26.34%
BenchmarkNatSqr/20-4         672           352           -47.62%
BenchmarkNatSqr/30-4         992           512           -48.39%
BenchmarkNatSqr/50-4         1792          896           -50.00%
BenchmarkNatSqr/80-4         2688          1408          -47.62%
BenchmarkNatSqr/100-4        3584          1792          -50.00%
BenchmarkNatSqr/200-4        6656          3456          -48.08%
BenchmarkNatSqr/300-4        24448         16387         -32.97%
BenchmarkNatSqr/500-4        36864         24591         -33.29%
BenchmarkNatSqr/800-4        69760         40981         -41.25%
BenchmarkNatSqr/1000-4       86016         49180         -42.82%
BenchmarkNatSqr/10000-4      2524800       487368        -80.70%
BenchmarkNatSqr/100000-4     68599808      5876581       -91.43%

Change-Id: I8e6e409ae1cb48be9d5aa9b5f428d6cbe487673a
Reviewed-on: https://go-review.googlesource.com/c/go/+/172017
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2019-10-25 03:14:39 +00:00
.github .github: don't render author-facing text in ISSUE_TEMPLATE 2018-11-02 04:47:34 +00:00
api api/go1.13: add debug/elf.Symbol fields added in CL 184099 2019-08-08 18:44:16 +00:00
doc cmd/go: add -modfile flag that sets go.mod file to read/write 2019-10-24 20:15:50 +00:00
lib/time lib/time: update tz data to 2019b 2019-07-03 23:08:27 +00:00
misc misc: delete benchcmp forwarding script 2019-10-23 21:41:15 +00:00
src math/big: use nat pool to reduce allocations in mul and sqr 2019-10-25 03:14:39 +00:00
test cmd/compile, cmd/link, runtime: make defers low-cost through inline code and extra funcdata 2019-10-24 13:54:11 +00:00
.gitattributes
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: change email address for Akhil Indurti 2019-09-09 15:30:38 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS C: update email address for utkarsh-extc 2019-10-03 12:39:06 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
PATENTS
README.md README: linkify some paths 2018-06-06 18:07:01 +00:00
robots.txt
SECURITY.md SECURITY.md: update go versions 2019-09-26 15:34:57 +00:00

README.md

The Go Programming Language

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