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  1. 14 Mar, 2017 15 commits
  3. 13 Mar, 2017 17 commits
    • Hugues Bruant's avatar
      runtime: add mapassign_fast* · ec091b6a
      Hugues Bruant authored 
      Add benchmarks for map assignment with int32/int64/string key

Benchmark results on darwin/amd64

name                  old time/op  new time/op  delta
MapAssignInt32_255-8  24.7ns ± 3%  17.4ns ± 2%  -29.75%  (p=0.000 n=10+10)
MapAssignInt32_64k-8  45.5ns ± 4%  37.6ns ± 4%  -17.18%  (p=0.000 n=10+10)
MapAssignInt64_255-8  26.0ns ± 3%  17.9ns ± 4%  -31.03%  (p=0.000 n=10+10)
MapAssignInt64_64k-8  46.9ns ± 5%  38.7ns ± 2%  -17.53%  (p=0.000 n=9+10)
MapAssignStr_255-8    47.8ns ± 3%  24.8ns ± 4%  -48.01%  (p=0.000 n=10+10)
MapAssignStr_64k-8    83.0ns ± 3%  51.9ns ± 3%  -37.45%  (p=0.000 n=10+9)

name                     old time/op    new time/op    delta
BinaryTree17-8              3.11s ±19%     2.78s ± 3%    ~     (p=0.095 n=5+5)
Fannkuch11-8                3.26s ± 1%     3.21s ± 2%    ~     (p=0.056 n=5+5)
FmtFprintfEmpty-8          50.3ns ± 1%    50.8ns ± 2%    ~     (p=0.246 n=5+5)
FmtFprintfString-8         82.7ns ± 4%    80.1ns ± 5%    ~     (p=0.238 n=5+5)
FmtFprintfInt-8            82.6ns ± 2%    81.9ns ± 3%    ~     (p=0.508 n=5+5)
FmtFprintfIntInt-8          124ns ± 4%     121ns ± 3%    ~     (p=0.111 n=5+5)
FmtFprintfPrefixedInt-8     158ns ± 6%     160ns ± 2%    ~     (p=0.341 n=5+5)
FmtFprintfFloat-8           249ns ± 2%     245ns ± 2%    ~     (p=0.095 n=5+5)
FmtManyArgs-8               513ns ± 2%     519ns ± 3%    ~     (p=0.151 n=5+5)
GobDecode-8                7.48ms ±12%    7.11ms ± 2%    ~     (p=0.222 n=5+5)
GobEncode-8                6.25ms ± 1%    6.03ms ± 2%  -3.56%  (p=0.008 n=5+5)
Gzip-8                      252ms ± 4%     252ms ± 4%    ~     (p=1.000 n=5+5)
Gunzip-8                   38.4ms ± 3%    38.6ms ± 2%    ~     (p=0.690 n=5+5)
HTTPClientServer-8         76.9µs ±41%    66.4µs ± 6%    ~     (p=0.310 n=5+5)
JSONEncode-8               16.5ms ± 3%    16.7ms ± 3%    ~     (p=0.421 n=5+5)
JSONDecode-8               54.6ms ± 1%    54.3ms ± 2%    ~     (p=0.548 n=5+5)
Mandelbrot200-8            4.45ms ± 3%    4.47ms ± 1%    ~     (p=0.841 n=5+5)
GoParse-8                  3.43ms ± 1%    3.32ms ± 2%  -3.28%  (p=0.008 n=5+5)
RegexpMatchEasy0_32-8      88.2ns ± 3%    89.4ns ± 2%    ~     (p=0.333 n=5+5)
RegexpMatchEasy0_1K-8       205ns ± 1%     206ns ± 1%    ~     (p=0.905 n=5+5)
RegexpMatchEasy1_32-8      85.1ns ± 1%    85.5ns ± 5%    ~     (p=0.690 n=5+5)
RegexpMatchEasy1_1K-8       365ns ± 1%     371ns ± 9%    ~     (p=1.000 n=5+5)
RegexpMatchMedium_32-8      129ns ± 2%     128ns ± 3%    ~     (p=0.730 n=5+5)
RegexpMatchMedium_1K-8     39.8µs ± 0%    39.7µs ± 4%    ~     (p=0.730 n=4+5)
RegexpMatchHard_32-8       1.99µs ± 3%    2.05µs ±16%    ~     (p=0.794 n=5+5)
RegexpMatchHard_1K-8       59.3µs ± 1%    60.3µs ± 7%    ~     (p=1.000 n=5+5)
Revcomp-8                   1.36s ±63%     0.52s ± 5%    ~     (p=0.095 n=5+5)
Template-8                 62.6ms ±14%    60.5ms ± 5%    ~     (p=0.690 n=5+5)
TimeParse-8                 330ns ± 2%     324ns ± 2%    ~     (p=0.087 n=5+5)
TimeFormat-8                350ns ± 3%     340ns ± 1%  -2.86%  (p=0.008 n=5+5)

name                     old speed      new speed      delta
GobDecode-8               103MB/s ±11%   108MB/s ± 2%    ~     (p=0.222 n=5+5)
GobEncode-8               123MB/s ± 1%   127MB/s ± 2%  +3.71%  (p=0.008 n=5+5)
Gzip-8                   77.1MB/s ± 4%  76.9MB/s ± 3%    ~     (p=1.000 n=5+5)
Gunzip-8                  505MB/s ± 3%   503MB/s ± 2%    ~     (p=0.690 n=5+5)
JSONEncode-8              118MB/s ± 3%   116MB/s ± 3%    ~     (p=0.421 n=5+5)
JSONDecode-8             35.5MB/s ± 1%  35.8MB/s ± 2%    ~     (p=0.397 n=5+5)
GoParse-8                16.9MB/s ± 1%  17.4MB/s ± 2%  +3.45%  (p=0.008 n=5+5)
RegexpMatchEasy0_32-8     363MB/s ± 3%   358MB/s ± 2%    ~     (p=0.421 n=5+5)
RegexpMatchEasy0_1K-8    4.98GB/s ± 1%  4.97GB/s ± 1%    ~     (p=0.548 n=5+5)
RegexpMatchEasy1_32-8     376MB/s ± 1%   375MB/s ± 5%    ~     (p=0.690 n=5+5)
RegexpMatchEasy1_1K-8    2.80GB/s ± 1%  2.76GB/s ± 9%    ~     (p=0.841 n=5+5)
RegexpMatchMedium_32-8   7.73MB/s ± 1%  7.76MB/s ± 3%    ~     (p=0.730 n=5+5)
RegexpMatchMedium_1K-8   25.8MB/s ± 0%  25.8MB/s ± 4%    ~     (p=0.651 n=4+5)
RegexpMatchHard_32-8     16.1MB/s ± 3%  15.7MB/s ±14%    ~     (p=0.794 n=5+5)
RegexpMatchHard_1K-8     17.3MB/s ± 1%  17.0MB/s ± 7%    ~     (p=0.984 n=5+5)
Revcomp-8                 273MB/s ±83%   488MB/s ± 5%    ~     (p=0.095 n=5+5)
Template-8               31.1MB/s ±13%  32.1MB/s ± 5%    ~     (p=0.690 n=5+5)

Updates #19495

Change-Id: I116e9a2a4594769318b22d736464de8a98499909
Reviewed-on: https://go-review.googlesource.com/38091Reviewed-by: default avatarJosh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: default avatarKeith Randall <khr@golang.org>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      ec091b6a
    • Aliaksandr Valialkin's avatar
      cmd/vet: check shift calculations with "unsafe" package · 53937aad
      Aliaksandr Valialkin authored 
      vet should properly handle shift calculations via "unsafe"
package after the CL 37950.

Change-Id: I7737f2e656a5166337a17b92db46a0997f2a4e0e
Reviewed-on: https://go-review.googlesource.com/38064Reviewed-by: default avatarJosh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      53937aad
    • Matthew Dempsky's avatar
      cmd/compile/internal/ssa: make ARM's udiv like other calls · cc71aa9a
      Matthew Dempsky authored 
      Passes toolstash-check -all.

Change-Id: Id389f8158cf33a3c0fcef373615b5351e7c74b5b
Reviewed-on: https://go-review.googlesource.com/38082
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarKeith Randall <khr@golang.org>
      cc71aa9a
    • David Chase's avatar
      Revert "cmd/compile: de-virtualize interface calls" · b59a4056
      David Chase authored 
      This reverts commit 4e0c7c3f.

Reason for revert: The presence-of-optimization test program is fragile, breaks under noopt, and might break if the Go libraries are tweaked.  It needs to be (re)written without reference to other packages.

Change-Id: I3aaf1ab006a1a255f961a978e9c984341740e3c7
Reviewed-on: https://go-review.googlesource.com/38097Reviewed-by: default avatarKeith Randall <khr@golang.org>
      b59a4056
    • Matthew Dempsky's avatar
      cmd/compile/internal/gc: refactor ACALL Prog creation · 118b3fe7
      Matthew Dempsky authored 
      This abstracts creation of ACALL Progs into package gc. The main
benefit of this today is we can refactor away a lot of common
boilerplate code.

Later, once liveness analysis happens on the SSA graph, this will also
provide an easy insertion point for emitting the PCDATA Progs
immediately before call instructions.

Passes toolstash-check -all.

Change-Id: Ia15108ace97201cd84314f1ca916dfeb4f09d61c
Reviewed-on: https://go-review.googlesource.com/38081Reviewed-by: default avatarKeith Randall <khr@golang.org>
      118b3fe7
    • Alberto Donizetti's avatar
      encoding/gob: add Encode-Decode Int slices tests · 2e7c3b3f
      Alberto Donizetti authored 
      Tinkering with the gob package shows that is currently possible to
*completely destroy* Int slices encoding without triggering a single
test failure.

The various encInt{8,16,32,64}Slice methods are only called during the
execution of the GobMapInterfaceEncode test, which only encodes a few
slices of length exactly 1 and then just checks that the error
returned by Encode is nil (without trying to Decode back the data).

This patch adds a few tests for signed integer slices encoding.

Change-Id: Ifaaee2f32132873118b241f79aa8203e4ad31416
Reviewed-on: https://go-review.googlesource.com/38066Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
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      2e7c3b3f
    • Matthew Dempsky's avatar
      cmd/compile/internal/ssa: replace {Defer,Go}Call with StaticCall · 08d8d5c9
      Matthew Dempsky authored 
      Passes toolstash-check -all.

Change-Id: Icf8b75364e4761a5e56567f503b2c1cb17382ed2
Reviewed-on: https://go-review.googlesource.com/38080
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarKeith Randall <khr@golang.org>
      08d8d5c9
    • khr's avatar
      cmd/compile: zero return parameters earlier · a51e4cc9
      khr authored 
      Move the zeroing of results earlier.  In particular, they need to
come before any move-to-heap operations, as those require allocation.
Those allocations are points at which the GC can see the uninitialized
result slots.

For the function:

func f() (x, y, z *int) {
  defer(){}()
  escape(&y)
  return
}

We used to generate code like this:

x = nil
y = nil
&y = new(int)
z = nil

Now we will generate:

x = nil
y = nil
z = nil
&y = new(int)

Since the fix for #18860, the return slots are always live if there
is a defer, so the former ordering allowed the GC to see junk
in the z slot.

Fixes #19078

Change-Id: I71554ae437549725bb79e13b2c100b2911d47ed4
Reviewed-on: https://go-review.googlesource.com/38133
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarMatthew Dempsky <mdempsky@google.com>
      a51e4cc9
    • Ilya Tocar's avatar
      cmd/internal/obj/x86: remove unused const · 27492a2a
      Ilya Tocar authored 
      Since https://go-review.googlesource.com/24040 we no longer pad functions
in asm6, so funcAlign is unused. Delete it.

Change-Id: Id710e545a76b1797398f2171fe7e0928811fcb31
Reviewed-on: https://go-review.googlesource.com/38134Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
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      27492a2a
    • Josh Bleecher Snyder's avatar
      cmd/compile: eliminate more nil checks of phis · c694f6f3
      Josh Bleecher Snyder authored 
      The existing implementation started by eliminating
nil checks for OpAddr, OpAddPtr, and OpPhis with
all non-nil args.

However, some OpPhis had all non-nil args,
but their args had not been processed yet.

Pull the OpPhi checks into their own loop,
and repeat until stabilization.

Eliminates a dozen additional nilchecks during make.bash.

Negligible compiler performance impact.

Change-Id: If7b803c3ad7582af7d9867d05ca13e03e109d864
Reviewed-on: https://go-review.googlesource.com/37999
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarDavid Chase <drchase@google.com>
      c694f6f3
    • Philip Hofer's avatar
      cmd/compile: de-virtualize interface calls · 4e0c7c3f
      Philip Hofer authored 
      With this change, code like

    h := sha1.New()
    h.Write(buf)
    sum := h.Sum()

gets compiled into static calls rather than
interface calls, because the compiler is able
to prove that 'h' is really a *sha1.digest.

The InterCall re-write rule hits a few dozen times
during make.bash, and hundreds of times during all.bash.

The most common pattern identified by the compiler
is a constructor like

    func New() Interface { return &impl{...} }

where the constructor gets inlined into the caller,
and the result is used immediately. Examples include
{sha1,md5,crc32,crc64,...}.New, base64.NewEncoder,
base64.NewDecoder, errors.New, net.Pipe, and so on.

Some existing benchmarks that change on darwin/amd64:

Crc64/ISO4KB-8        2.67µs ± 1%    2.66µs ± 0%  -0.36%  (p=0.015 n=10+10)
Crc64/ISO1KB-8         694ns ± 0%     690ns ± 1%  -0.59%  (p=0.001 n=10+10)
Adler32KB-8            473ns ± 1%     471ns ± 0%  -0.39%  (p=0.010 n=10+9)

On architectures like amd64, the reduction in code size
appears to contribute more to benchmark improvements than just
removing the indirect call, since that branch gets predicted
accurately when called in a loop.

Updates #19361

Change-Id: Ia9d30afdd5f6b4d38d38b14b88f308acae8ce7ed
Reviewed-on: https://go-review.googlesource.com/37751
Run-TryBot: Philip Hofer <phofer@umich.edu>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarKeith Randall <khr@golang.org>
      4e0c7c3f
    • Robert Griesemer's avatar
      spec: remove superfluous terms "delimiter" and "special tokens" · 26e726c3
      Robert Griesemer authored 
      The (original) section on "Operators and Delimiters" introduced
superfluous terminology ("delimiter", "special token") which
didn't matter and was used inconsistently.

Removed any mention of "delimiter" or "special token" and now
simply group the special character tokens into "operators"
(clearly defined via links), and "punctuation" (everything else).

Fixes #19450.

Change-Id: Ife31b24b95167ace096f93ed180b7eae41c66808
Reviewed-on: https://go-review.googlesource.com/38073Reviewed-by: default avatarMatthew Dempsky <mdempsky@google.com>
Reviewed-by: default avatarRob Pike <r@golang.org>
      26e726c3
    • Chew Choon Keat's avatar
      net/http: unset proxy environment after test · eb715fbb
      Chew Choon Keat authored 
      Fix last proxy in TestProxyFromEnvironment bleeds into other tests
Change ResetProxyEnv to use the newer os.Unsetenv, instead of hard
coding as ""

Change-Id: I67cf833dbcf4bec2e10ea73c354334160cf05f84
Reviewed-on: https://go-review.googlesource.com/38115
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      eb715fbb
    • Dave Cheney's avatar
      cmd/compile/internal/gc: remove unused exportsize variable · dd0e1acf
      Dave Cheney authored 
      In Go 1.7 and earlier, gc.exportsize tracked the number of bytes
written through exportf. With the removal of the old exporter in Go 1.8
exportf is only used for printing the build id, and the header and
trailer of the binary export format. The size of the export data is
now returned directly from the exporter and exportsize is never
referenced. Remove it.

Change-Id: Id301144b3c26c9004c722d0c55c45b0e0801a88c
Reviewed-on: https://go-review.googlesource.com/38116
Run-TryBot: Dave Cheney <dave@cheney.net>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      dd0e1acf
    • Dave Cheney's avatar
      cmd/go/internal/get: remove unused tag selection code · d5a9fbd5
      Dave Cheney authored 
      selectTag has been hard coded to only understand the tag `go1` since
CL 6112060 which landed in 2012. The commit message asserted;

  Right now (before go1.0.1) there is only one possible tag,
  "go1", and I'd like to keep it that way.

Remove goTag and the unused matching code in selectTag.

Change-Id: I85f7c10f95704e22f8e8681266afd72bbcbe8fbd
Reviewed-on: https://go-review.googlesource.com/38112Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
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      d5a9fbd5
    • Dave Cheney's avatar
      runtime: remove sizeToClass · 7ee43faf
      Dave Cheney authored 
      CL 32219 added precomputed sizeclass tables.

Remove the unused sizeToClass method which was previously only
called from initSizes.

Change-Id: I907bf9ed78430ecfaabbec7fca77ef2375010081
Reviewed-on: https://go-review.googlesource.com/38113
Run-TryBot: Dave Cheney <dave@cheney.net>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      7ee43faf
    • Marcel Edmund Franke's avatar
      net/http: fix body close statement is missing · e831bd1f
      Marcel Edmund Franke authored 
      Call body close after ioutil.ReadAll is done

Change-Id: Ieceb1965a6a8f2dbc024e983acdfe22df17d07d1
Reviewed-on: https://go-review.googlesource.com/38059Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      e831bd1f
  5. 12 Mar, 2017 2 commits
    • Martin Möhrmann's avatar
      strconv: fix performance regression in integer formatting on 32bit platforms · b71ed4ed
      Martin Möhrmann authored 
      Some of the changes in CL golang.org/cl/38071/ assumed that / and %
could always be combined to use only one DIV instruction. However,
this is not the case for 64bit operands on a 32bit platform which use
seperate runtime functions to calculate division and modulo.

This CL restores the original optimizations that help on 32bit platforms
with negligible impact on 64bit platforms.

386:
name          old time/op  new time/op  delta
FormatInt-2   6.06µs ± 0%  6.02µs ± 0%  -0.70%  (p=0.000 n=20+20)
AppendInt-2   4.98µs ± 0%  4.98µs ± 0%    ~     (p=0.747 n=18+18)
FormatUint-2  1.93µs ± 0%  1.85µs ± 0%  -4.19%  (p=0.000 n=20+20)
AppendUint-2  1.71µs ± 0%  1.64µs ± 0%  -3.68%  (p=0.000 n=20+20)

amd64:
name          old time/op  new time/op  delta
FormatInt-2   2.41µs ± 0%  2.41µs ± 0%  -0.09%  (p=0.010 n=18+18)
AppendInt-2   1.77µs ± 0%  1.77µs ± 0%  +0.08%  (p=0.000 n=18+18)
FormatUint-2   653ns ± 1%   653ns ± 0%    ~     (p=0.178 n=20+20)
AppendUint-2   514ns ± 0%   513ns ± 0%  -0.13%  (p=0.000 n=20+17)

Change-Id: I574a18e54fb41b25fbe51ce696e7a8765abc79a6
Reviewed-on: https://go-review.googlesource.com/38051
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarRobert Griesemer <gri@golang.org>
      b71ed4ed
    • Matthew Dempsky's avatar
      cmd/link: eliminate markextra · d3434782
      Matthew Dempsky authored 
      This appears to be leftover from when instruction selection happened
in the linker. Many of the morestackX functions listed don't even
exist anymore.

Now that we select instructions within the compiler and assembler,
normal deadcode elimination mechanisms should suffice for these
symbols.

Change-Id: I2cb1e435101392e7c983957c4acfbbcc87a5ca7d
Reviewed-on: https://go-review.googlesource.com/38077
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      d3434782
  7. 11 Mar, 2017 4 commits
  9. 10 Mar, 2017 2 commits
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