delta/go-git.git/src/math/big/arith_test.go, branch dev.debug

math/big: replace local versions of bitLen, nlz with math/bits versions

2017-03-23T19:43:09+00:00

Verified that BenchmarkBitLen time went down from 2.25 ns/op to 0.65 ns/op
an a 2.3 GHz Intel Core i7, before removing that benchmark (now covered by
math/bits benchmarks).

Change-Id: I3890bb7d1889e95b9a94bd68f0bdf06f1885adeb
Reviewed-on: https://go-review.googlesource.com/38464
Run-TryBot: Robert Griesemer 
TryBot-Result: Gobot Gobot 
Reviewed-by: Brad Fitzpatrick

math/big: cut 2 minutes off race tests

2016-09-14T19:11:43+00:00

No need to test so many sizes in race mode, especially for a package
which doesn't use goroutines.

Reduces test time from 2.5 minutes to 25 seconds.

Updates #17104

Change-Id: I7065b39273f82edece385c0d67b3f2d83d4934b8
Reviewed-on: https://go-review.googlesource.com/29163
Reviewed-by: David Crawshaw

math/big: simplify benchmarking code some more

2016-05-26T16:27:24+00:00

Follow-up cleanup to https://golang.org/cl/23424/ .

Change-Id: Ifb05c1ff5327df6bc5f4cbc554e18363293f7960
Reviewed-on: https://go-review.googlesource.com/23446
Reviewed-by: Marcel van Lohuizen

math/big: use run for benchmarks

2016-05-25T17:49:37+00:00

shortens code and gives an example of the use of Run.

Change-Id: I75ffaf762218a589274b4b62e19022e31e805d1b
Reviewed-on: https://go-review.googlesource.com/23424
Reviewed-by: Russ Cox 
Run-TryBot: Marcel van Lohuizen 
TryBot-Result: Gobot Gobot

all: delete dead test code

2016-03-21T07:10:08+00:00

This deletes unused code and helpers from tests.

Change-Id: Ie31d46115f558ceb8da6efbf90c3c204e03b0d7e
Reviewed-on: https://go-review.googlesource.com/20927
Reviewed-by: Brad Fitzpatrick 
Run-TryBot: Brad Fitzpatrick 
TryBot-Result: Gobot Gobot

all: single space after period.

2016-03-02T00:13:47+00:00

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/20022
Reviewed-by: Rob Pike 
Reviewed-by: Dave Day 
Run-TryBot: Brad Fitzpatrick 
TryBot-Result: Gobot Gobot

math/big: test that subVW and addVW work with arbitrary y

2015-04-21T23:13:33+00:00

Fixes #10525.

Change-Id: I92dc87f5d6db396d8dde2220fc37b7093b772d81
Reviewed-on: https://go-review.googlesource.com/9210
Reviewed-by: Robert Griesemer

math/big: faster "pure Go" addition/subtraction for long vectors

2015-01-08T17:00:59+00:00

          (platforms w/o corresponding assembly kernels)

For short vector adds there's some erradic slow-down, but overall
these routines have become significantly faster. This only matters
for platforms w/o native (assembly) versions of these kernels, so
we are not concerned about the minor slow-down for short vectors.

This code was already reviewed under Mercurial (golang.org/cl/172810043)
but wasn't submitted before the switch to git.

Benchmarks run on 2.3GHz Intel Core i7, running OS X 10.9.5,
with the respective AddVV and AddVW assembly routines disabled.

benchmark              old ns/op     new ns/op     delta
BenchmarkAddVV_1       6.59          7.09          +7.59%
BenchmarkAddVV_2       10.3          10.1          -1.94%
BenchmarkAddVV_3       10.9          12.6          +15.60%
BenchmarkAddVV_4       13.9          15.6          +12.23%
BenchmarkAddVV_5       16.8          17.3          +2.98%
BenchmarkAddVV_1e1     29.5          29.9          +1.36%
BenchmarkAddVV_1e2     246           232           -5.69%
BenchmarkAddVV_1e3     2374          2185          -7.96%
BenchmarkAddVV_1e4     58942         22292         -62.18%
BenchmarkAddVV_1e5     668622        225279        -66.31%
BenchmarkAddVW_1       6.81          5.58          -18.06%
BenchmarkAddVW_2       7.69          6.86          -10.79%
BenchmarkAddVW_3       9.56          8.32          -12.97%
BenchmarkAddVW_4       12.1          9.53          -21.24%
BenchmarkAddVW_5       13.2          10.9          -17.42%
BenchmarkAddVW_1e1     23.4          18.0          -23.08%
BenchmarkAddVW_1e2     175           141           -19.43%
BenchmarkAddVW_1e3     1568          1266          -19.26%
BenchmarkAddVW_1e4     15425         12596         -18.34%
BenchmarkAddVW_1e5     156737        133539        -14.80%
BenchmarkFibo          381678466     132958666     -65.16%

benchmark              old MB/s     new MB/s     speedup
BenchmarkAddVV_1       9715.25      9028.30      0.93x
BenchmarkAddVV_2       12461.72     12622.60     1.01x
BenchmarkAddVV_3       17549.64     15243.82     0.87x
BenchmarkAddVV_4       18392.54     16398.29     0.89x
BenchmarkAddVV_5       18995.23     18496.57     0.97x
BenchmarkAddVV_1e1     21708.98     21438.28     0.99x
BenchmarkAddVV_1e2     25956.53     27506.88     1.06x
BenchmarkAddVV_1e3     26947.93     29286.66     1.09x
BenchmarkAddVV_1e4     10857.96     28709.46     2.64x
BenchmarkAddVV_1e5     9571.91      28409.21     2.97x
BenchmarkAddVW_1       1175.28      1433.98      1.22x
BenchmarkAddVW_2       2080.01      2332.54      1.12x
BenchmarkAddVW_3       2509.28      2883.97      1.15x
BenchmarkAddVW_4       2646.09      3356.83      1.27x
BenchmarkAddVW_5       3020.69      3671.07      1.22x
BenchmarkAddVW_1e1     3425.76      4441.40      1.30x
BenchmarkAddVW_1e2     4553.17      5642.96      1.24x
BenchmarkAddVW_1e3     5100.14      6318.72      1.24x
BenchmarkAddVW_1e4     5186.15      6350.96      1.22x
BenchmarkAddVW_1e5     5104.07      5990.74      1.17x

Change-Id: I7a62023b1105248a0e85e5b9819d3fd4266123d4
Reviewed-on: https://go-review.googlesource.com/2480
Reviewed-by: Russ Cox 
Reviewed-by: Alan Donovan

build: move package sources from src/pkg to src

2014-09-08T04:08:51+00:00

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.