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  1. 25 Mar, 2019 4 commits
  3. 24 Mar, 2019 3 commits
    • sergey's avatar
      net/url: check for lowercase before uppercase in shouldEscape · c7bb4533
      sergey authored 
      Most chars in URLs are lowercase, so check that first.

Performance change:

String-4               7.62µs ± 1%    7.27µs ± 3%  -4.61%  (p=0.008 n=5+5)
QueryEscape/#00-4      92.6ns ± 3%    90.3ns ± 1%  -2.48%  (p=0.016 n=5+5)
QueryEscape/#01-4       515ns ± 4%     510ns ± 2%    ~     (p=0.683 n=5+5)
QueryEscape/#02-4       375ns ± 1%     343ns ± 1%  -8.52%  (p=0.008 n=5+5)
QueryEscape/#03-4       758ns ± 1%     699ns ± 1%  -7.83%  (p=0.008 n=5+5)
QueryEscape/#04-4      6.06µs ± 1%    5.74µs ± 1%  -5.38%  (p=0.008 n=5+5)
PathEscape/#00-4        140ns ± 1%     135ns ± 2%  -3.85%  (p=0.008 n=5+5)
PathEscape/#01-4        511ns ± 3%     507ns ± 3%    ~     (p=0.587 n=5+5)
PathEscape/#02-4        372ns ± 1%     342ns ± 2%  -8.22%  (p=0.008 n=5+5)
PathEscape/#03-4        747ns ± 1%     685ns ± 1%  -8.30%  (p=0.008 n=5+5)
PathEscape/#04-4       5.94µs ± 1%    5.64µs ± 3%  -4.98%  (p=0.008 n=5+5)
QueryUnescape/#00-4     111ns ± 4%     110ns ± 2%    ~     (p=0.952 n=5+5)
QueryUnescape/#01-4     390ns ± 0%     391ns ± 2%    ~     (p=0.714 n=5+5)
QueryUnescape/#02-4     297ns ± 5%     295ns ± 3%    ~     (p=0.524 n=5+5)
QueryUnescape/#03-4     543ns ± 3%     556ns ± 2%  +2.39%  (p=0.032 n=5+5)
QueryUnescape/#04-4    3.23µs ± 3%    3.22µs ± 2%    ~     (p=1.000 n=5+5)
PathUnescape/#00-4      111ns ± 1%     110ns ± 3%    ~     (p=0.881 n=5+5)
PathUnescape/#01-4      389ns ± 2%     386ns ± 2%    ~     (p=0.444 n=5+5)
PathUnescape/#02-4      297ns ± 1%     295ns ± 3%    ~     (p=0.738 n=5+5)
PathUnescape/#03-4      557ns ± 3%     553ns ± 2%    ~     (p=0.810 n=5+5)
PathUnescape/#04-4     2.94µs ± 2%    2.97µs ± 2%    ~     (p=0.222 n=5+5)

Change-Id: I7e6d64cd5f8f5218cb40f52f0015168a8674aabb
Reviewed-on: https://go-review.googlesource.com/c/go/+/168883Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      c7bb4533
    • Alex Brainman's avatar
      cmd/go: keep WINDIR during TestScript · 7722f6d2
      Alex Brainman authored 
      TestScript executes PowerShell. And PowerShell appears to require
WINDIR environment variable to exists on windows-arm.

So keep WINDIR environment variable when running PowerShell.

Fixes #30711

Change-Id: I14dde6614347325a8f3caf994ea8ab05294450a5
Reviewed-on: https://go-review.googlesource.com/c/go/+/168859
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      7722f6d2
    • Daniel Martí's avatar
      text/template: allow using -}} with many spaces · e770b5b3
      Daniel Martí authored 
      lexSpace consumed all spaces, even if the last one was part of a right
delimiter like " -}}". Thus, "3  -}}" wouldn't lex as "3" and a right
delimiter, but as "3", "-", and "}}".

To fix that, make lexSpace stop if it encounters a right delimiter.

Fixes #30948.

Change-Id: I80a5546e5809e54f6823e2bf3a57a7e8808329be
Reviewed-on: https://go-review.googlesource.com/c/go/+/168457Reviewed-by: default avatarDaniel Martí <mvdan@mvdan.cc>
      e770b5b3
  5. 23 Mar, 2019 3 commits
  7. 22 Mar, 2019 14 commits
  9. 21 Mar, 2019 14 commits
  11. 20 Mar, 2019 2 commits
    • Josh Bleecher Snyder's avatar
      testing: stop rounding b.N · 03a79e94
      Josh Bleecher Snyder authored 
      The original goal of rounding to readable b.N
was to make it easier to eyeball times.
However, proper analysis requires tooling
(such as benchstat) anyway.

Instead, take b.N as it comes.
This will reduce the impact of external noise
such as GC on benchmarks.

This requires reworking our iteration estimates.
We used to calculate the estimated ns/op
and then divide our target ns by that estimate.
However, this order of operations was destructive
when the ns/op was very small; rounding could
hide almost an order of magnitude of variation.
Instead, multiply first, then divide.
Also, make n an int64 to avoid overflow.

Prior to this change, we attempted to cap b.N at 1e9.
Due to rounding up, it was possible to get b.N as high as 2e9.
This change consistently enforces the 1e9 cap.

This change also reduces the wall time required to run benchmarks.

Here's the impact of this change on the wall time to run
all benchmarks once with benchtime=1s on some std packages:

name           old time/op       new time/op       delta
bytes                 306s ± 1%         238s ± 1%  -22.24%  (p=0.000 n=10+10)
encoding/json         112s ± 8%          99s ± 7%  -11.64%  (p=0.000 n=10+10)
net/http             54.7s ± 7%        44.9s ± 4%  -17.94%  (p=0.000 n=10+9)
runtime               957s ± 1%         714s ± 0%  -25.38%  (p=0.000 n=10+9)
strings               262s ± 1%         201s ± 1%  -23.27%  (p=0.000 n=10+10)
[Geo mean]            216s              172s       -20.23%

Updates #24735

Change-Id: I7e38efb8e23c804046bf4fc065b3f5f3991d0a15
Reviewed-on: https://go-review.googlesource.com/c/go/+/112155Reviewed-by: default avatarAustin Clements <austin@google.com>
      03a79e94
    • Carlos Eduardo Seo's avatar
      cmd/compile/internal, cmd/internal/obj/ppc64: generate new count trailing... · 3023d7da
      Carlos Eduardo Seo authored 
      cmd/compile/internal, cmd/internal/obj/ppc64: generate new count trailing zeros instructions on POWER9

This change adds new POWER9 instructions for counting trailing zeros (CNTTZW/CNTTZD)
to the assembler and generates them in SSA when GOPPC64=power9.

name                 old time/op  new time/op  delta
TrailingZeros-160    1.59ns ±20%  1.45ns ±10%  -8.81%  (p=0.000 n=14+13)
TrailingZeros8-160   1.55ns ±23%  1.62ns ±44%    ~     (p=0.593 n=13+15)
TrailingZeros16-160  1.78ns ±23%  1.62ns ±38%  -9.31%  (p=0.003 n=14+14)
TrailingZeros32-160  1.64ns ±10%  1.49ns ± 9%  -9.15%  (p=0.000 n=13+14)
TrailingZeros64-160  1.53ns ± 6%  1.45ns ± 5%  -5.38%  (p=0.000 n=15+13)

Change-Id: I365e6ff79f3ce4d8ebe089a6a86b1771853eb596
Reviewed-on: https://go-review.googlesource.com/c/go/+/167517Reviewed-by: default avatarLynn Boger <laboger@linux.vnet.ibm.com>
      3023d7da
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