Commits · 282db6273e1194f62af9cebfdd165dea3c63b1a3 · go / golang

29 Apr, 2015 11 commits

cmd/objdump: disable external linking test on openbsd/arm · 282db627

Joel Sing authored Apr 29, 2015

Disable disassembly with external linking test on openbsd/arm, since this
platform does not currently support cgo/external linking.

Change-Id: I6eab6fcaac21407ce05075a4a1407fbfe0e6142b
Reviewed-on: https://go-review.googlesource.com/9481Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

282db627

cmd/internal/obj: do not generate data for $f32. and $f64. symbols at assemble time · 73e791a3

Shenghou Ma authored Apr 02, 2015

When reading the object files for linking, liblink takes care of
generate the data for them.

This is a port of https://golang.org/cl/3101 to Go.

Change-Id: Ie3e2d6515bd7d253a8c1e25c70ef8fed064436d8
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/8383Reviewed-by: Ian Lance Taylor <iant@golang.org>

73e791a3

runtime: tail call into memeq/cmp body implementations · c526f3ac

Keith Randall authored Apr 21, 2015

There's no need to call/ret to the body implementation.
It can write the result to the right place.  Just jump to
it and have it return to our caller.

Old:
  call body implementation
  compute result
  put result in a register
  return
  write register to result location
  return

New:
  load address of result location into a register
  jump to body implementation
  compute result
  write result to passed-in address
  return

It's a bit tricky on 386 because there is no free register
with which to pass the result location.  Free up a register
by keeping around blen-alen instead of both alen and blen.

Change-Id: If2cf0682a5bf1cc592bdda7c126ed4eee8944fba
Reviewed-on: https://go-review.googlesource.com/9202Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

c526f3ac

runtime: skip gdb goroutine backtrace test on non-x86 · 7e49c819

Shenghou Ma authored Apr 29, 2015

Gdb is not able to backtrace our non-standard stack frames on RISC
architectures without frame pointer.

Change-Id: Id62a566ce2d743602ded2da22ff77b9ae34bc5ae
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/9456Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

7e49c819

image/gif: check that individual frame's bounds are within the overall · 6abfdc3f

Nigel Tao authored Apr 29, 2015

GIF's bounds.

Also change the implicit Config Width and Height to be the
Rectangle.Max, not the Dx and Dy, of the first frame's bounds. For the
case where the first frame's bounds is something like (5,5)-(8,8), the
overall width should be 8, not 3.

Change-Id: I3affc484f5e32941a36f15517a92ca8d189d9c22
Reviewed-on: https://go-review.googlesource.com/9465Reviewed-by: Rob Pike <r@golang.org>

6abfdc3f

net: remove dead code in Write · a0cff298

Mikio Hara authored Apr 29, 2015

Also, please be informed that the Write method on both connected and
unconnected-mode sockets may return a positive number of bytes written
with timeout or use of closed network connection error.

Change-Id: I2e2e6192e29cef4e9389eb0422c605c6d12e6a3c
Reviewed-on: https://go-review.googlesource.com/9466Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

a0cff298

cmd/internal/obj: Delete Link.Symmorestack · 4b23b50f

Michael Hudson-Doyle authored Apr 23, 2015

This started out as trying to remove Bool2int calls, which it does a bit, but
mostly it ended up being removing the Link.Symmorestack array which seemed a
pointless bit of caching.

Change-Id: I91a51eb08cb4b08f3f9f093b575306499267b67a
Reviewed-on: https://go-review.googlesource.com/9239Reviewed-by: Minux Ma <minux@golang.org>
Run-TryBot: Minux Ma <minux@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

4b23b50f

cmd/internal/ld, runtime: unify stack reservation in PE header and runtime · da11a9dd

Shenghou Ma authored Apr 29, 2015

With 128KB stack reservation, on 32-bit Windows, the maximum number
threads is ~9000.

The original 65535-byte stack commit is causing problem on Windows
XP where it makes the stack reservation to be 1MB despite the fact
that the runtime specified 128KB.

While we're at here, also fix the extra spacings in the unable to
create more OS thread error message: println will insert a space
between each argument.

See #9457 for more information.

Change-Id: I3a82f7d9717d3d55211b6eb1c34b00b0eaad83ed
Reviewed-on: https://go-review.googlesource.com/2237Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Run-TryBot: Minux Ma <minux@golang.org>

da11a9dd

net: rename dialgoogle_test.go to external_test.go · edac5d91

Mikio Hara authored Apr 28, 2015

In the followup changes, tests that require external facilities such as
DNS servers and RRs will move into external_test.go.

Change-Id: Ib460b0c51961159830357652dbf5430e1ba01514
Reviewed-on: https://go-review.googlesource.com/9461Reviewed-by: Dave Cheney <dave@cheney.net>

edac5d91

cmd/internal/gc: fix write barrier fast path on RISC architectures · 2b7505e2

Shenghou Ma authored Apr 28, 2015

They have to read the boolean into a register first and then do
the comparison.

Fixes #10598.

Change-Id: I2b808837a8c6393e1e0778296b6592aaab2b04bf
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/9453Reviewed-by: Dave Cheney <dave@cheney.net>

2b7505e2

cmd/internal/gc, cmd/[56789]g: rename stackcopy to blockcopy · e7dd2889

Shenghou Ma authored Apr 08, 2015

To avoid confusion with the runtime concept of copying stack.

Change-Id: I33442377b71012c2482c2d0ddd561492c71e70d0
Reviewed-on: https://go-review.googlesource.com/8639Reviewed-by: Dave Cheney <dave@cheney.net>
Reviewed-by: Russ Cox <rsc@golang.org>

e7dd2889

28 Apr, 2015 24 commits

image/gif: encode disposal, bg index and Config. · baf3814b

Nigel Tao authored Apr 28, 2015

The previous CL implemented decoding, but not encoding.

Also return the global color map (if present) for DecodeConfig.

Change-Id: I3b99c93720246010c9fe0924dc40a67875dfc852
Reviewed-on: https://go-review.googlesource.com/9389Reviewed-by: Rob Pike <r@golang.org>

baf3814b

runtime/cgo: use PTHREAD_{MUTEX,COND}_INITIALIZER · 0c62c93a

Ian Lance Taylor authored Apr 28, 2015

Technically you must initialize static pthread_mutex_t and
pthread_cond_t variables with the appropriate INITIALIZER macro.  In
practice the default initializers are zero anyhow, but it's still good
code hygiene.

Change-Id: I517304b16c2c7943b3880855c1b47a9a506b4bdf
Reviewed-on: https://go-review.googlesource.com/9433Reviewed-by: David Crawshaw <crawshaw@golang.org>

0c62c93a

net/http: documentation updates · 339cf980

Brad Fitzpatrick authored Apr 28, 2015

Fixes #10366 (how to set custom headers)
Fixes #9836 (PATCH in PostForm)
Fixes #9276 (generating a server-side Request for testing)
Update #8991 (clarify Response.Write for now; export ReverseProxy's copy later?)

Change-Id: I95a11bf3bb3eeeeb72775b6ebfbc761641addc35
Reviewed-on: https://go-review.googlesource.com/9410Reviewed-by: David Crawshaw <crawshaw@golang.org>

339cf980

doc/go1.5.txt: snow leopard not maintained · ac354ba7

Rob Pike authored Apr 28, 2015

Change-Id: If50fd2dd4005d0ce39081c6b8302707403c139f9
Reviewed-on: https://go-review.googlesource.com/9432Reviewed-by: Rob Pike <r@golang.org>

ac354ba7

net/http: test and document suppressing implicit Content-Type response header · 5ed44e9d

Brad Fitzpatrick authored Apr 28, 2015

No code changes.

Fixes #8992

Change-Id: I10c8340a4f8e3e7add9b3ac5aa0a1e8d8aa49f40
Reviewed-on: https://go-review.googlesource.com/9412Reviewed-by: David Crawshaw <crawshaw@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>

5ed44e9d

cmd/doc: print documentation for all matches in a package, not just the first · d3bd6b6a

Rob Pike authored Apr 28, 2015

Change-Id: Id0d4ac7169f741dfeec7b1e67bdc21e49ae37b9e
Reviewed-on: https://go-review.googlesource.com/9430Reviewed-by: Russ Cox <rsc@golang.org>

d3bd6b6a

cmd/asm: add comments back for aliases on jumps for x86 · a88994c1

Rob Pike authored Apr 28, 2015

These were lost in the transition from 8a/6a to asm.
Also, in the process, discover more aliases. I'm betting the missing
ones were a casualty of the recent merge of 386 and amd64.

Update #10385.

Change-Id: I1681034b25af3ffc103f75e5fc57baca5feb3fcd
Reviewed-on: https://go-review.googlesource.com/9431Reviewed-by: Russ Cox <rsc@golang.org>

a88994c1

doc: mention several recent crypto changes in go1.5.txt · d2d840aa

Adam Langley authored Apr 28, 2015

Change-Id: Icf212fc7ea108ff22bb7fa9da137410d729d2569
Reviewed-on: https://go-review.googlesource.com/9413Reviewed-by: Adam Langley <agl@golang.org>

d2d840aa

encoding/asn1: Improved control of flags and times · 0bb96bea

Richard Barnes authored Feb 12, 2015

This change corrects the serialization of asn1.Flag values, so that
when set, they serialize to an empty value, and when unset, they are
omitted. It also adds a format parameter that allows calling code
to control whether time.Time values are serialized as UTCTime or
GeneralizedTime.

Change-Id: I6d97abf009ea317338dab30c80f35a2de7e07104
Reviewed-on: https://go-review.googlesource.com/5970Reviewed-by: Adam Langley <agl@golang.org>
Run-TryBot: Adam Langley <agl@golang.org>

0bb96bea

crypto/x509: allow parsing of certificates with unknown critical extensions. · d942737f

Adam Langley authored Apr 26, 2015

Previously, unknown critical extensions were a parse error. However, for
some cases one wishes to parse and use a certificate that may contain
these extensions. For example, when using a certificate in a TLS server:
it's the client's concern whether it understands the critical extensions
but the server still wishes to parse SNI values out of the certificate
etc.

This change moves the rejection of unknown critical extensions from
ParseCertificate to Certificate.Verify. The former will now record the
OIDs of unknown critical extensions in the Certificate and the latter
will fail to verify certificates with them. If a user of this package
wishes to handle any unknown critical extensions themselves, they can
extract the extensions from Certificate.Extensions, process them and
remove known OIDs from Certificate.UnknownCriticalExtensions.

See discussion at
https://groups.google.com/forum/#!msg/golang-nuts/IrzoZlwalTQ/qdK1k-ogeHIJ
and in the linked bug.

Fixes #10459

Change-Id: I762521a44c01160fa0901f990ba2f5d4977d7977
Reviewed-on: https://go-review.googlesource.com/9390Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

d942737f

runtime: eliminate one heapBitsForObject from scanobject · 63caec5d

Austin Clements authored Apr 26, 2015

scanobject with ptrmask!=nil is only ever called with the base
pointer of a heap object. Currently, scanobject calls
heapBitsForObject, which goes to a great deal of trouble to check
that the pointer points into the heap and to find the base of the
object it points to, both of which are completely unnecessary in
this case.

Replace this call to heapBitsForObject with much simpler logic to
fetch the span and compute the heap bits.

Benchmark results with five runs:

name old mean new mean delta
BenchmarkBinaryTree17 9.21s × (0.95,1.02) 8.55s × (0.91,1.03) -7.16% (p=0.022)
BenchmarkFannkuch11 2.65s × (1.00,1.00) 2.62s × (1.00,1.00) -1.10% (p=0.000)
BenchmarkFmtFprintfEmpty 73.2ns × (0.99,1.01) 71.7ns × (1.00,1.01) -1.99% (p=0.004)
BenchmarkFmtFprintfString 302ns × (0.99,1.00) 292ns × (0.98,1.02) -3.31% (p=0.020)
BenchmarkFmtFprintfInt 281ns × (0.98,1.01) 279ns × (0.96,1.02) ~ (p=0.596)
BenchmarkFmtFprintfIntInt 482ns × (0.98,1.01) 488ns × (0.95,1.02) ~ (p=0.419)
BenchmarkFmtFprintfPrefixedInt 382ns × (0.99,1.01) 365ns × (0.96,1.02) -4.35% (p=0.015)
BenchmarkFmtFprintfFloat 475ns × (0.99,1.01) 472ns × (1.00,1.00) ~ (p=0.108)
BenchmarkFmtManyArgs 1.89µs × (1.00,1.01) 1.90µs × (0.94,1.02) ~ (p=0.883)
BenchmarkGobDecode 22.4ms × (0.99,1.01) 21.9ms × (0.92,1.04) ~ (p=0.332)
BenchmarkGobEncode 24.7ms × (0.98,1.02) 23.9ms × (0.87,1.07) ~ (p=0.407)
BenchmarkGzip 397ms × (0.99,1.01) 398ms × (0.99,1.01) ~ (p=0.718)
BenchmarkGunzip 96.7ms × (1.00,1.00) 96.9ms × (1.00,1.00) ~ (p=0.230)
BenchmarkHTTPClientServer 71.5µs × (0.98,1.01) 68.5µs × (0.92,1.06) ~ (p=0.243)
BenchmarkJSONEncode 46.1ms × (0.98,1.01) 44.9ms × (0.98,1.03) -2.51% (p=0.040)
BenchmarkJSONDecode 86.1ms × (0.99,1.01) 86.5ms × (0.99,1.01) ~ (p=0.343)
BenchmarkMandelbrot200 4.12ms × (1.00,1.00) 4.13ms × (1.00,1.00) +0.23% (p=0.000)
BenchmarkGoParse 5.89ms × (0.96,1.03) 5.82ms × (0.96,1.04) ~ (p=0.522)
BenchmarkRegexpMatchEasy0_32 141ns × (0.99,1.01) 142ns × (1.00,1.00) ~ (p=0.178)
BenchmarkRegexpMatchEasy0_1K 408ns × (1.00,1.00) 392ns × (0.99,1.00) -3.83% (p=0.000)
BenchmarkRegexpMatchEasy1_32 122ns × (1.00,1.00) 122ns × (1.00,1.00) ~ (p=0.178)
BenchmarkRegexpMatchEasy1_1K 626ns × (1.00,1.01) 624ns × (0.99,1.00) ~ (p=0.122)
BenchmarkRegexpMatchMedium_32 202ns × (0.99,1.00) 205ns × (0.99,1.01) +1.58% (p=0.001)
BenchmarkRegexpMatchMedium_1K 54.4µs × (1.00,1.00) 55.5µs × (1.00,1.00) +1.86% (p=0.000)
BenchmarkRegexpMatchHard_32 2.68µs × (1.00,1.00) 2.71µs × (1.00,1.00) +0.97% (p=0.002)
BenchmarkRegexpMatchHard_1K 79.8µs × (1.00,1.01) 80.5µs × (1.00,1.01) +0.94% (p=0.003)
BenchmarkRevcomp 590ms × (0.99,1.01) 585ms × (1.00,1.00) ~ (p=0.066)
BenchmarkTemplate 111ms × (0.97,1.02) 112ms × (0.99,1.01) ~ (p=0.201)
BenchmarkTimeParse 392ns × (1.00,1.00) 385ns × (1.00,1.00) -1.69% (p=0.000)
BenchmarkTimeFormat 449ns × (0.98,1.01) 448ns × (0.99,1.01) ~ (p=0.550)

Change-Id: Ie7c3830c481d96c9043e7bf26853c6c1d05dc9f4
Reviewed-on: https://go-review.googlesource.com/9364Reviewed-by: Rick Hudson <rlh@golang.org>

63caec5d

cmd/internal/ld: remove Biobuf unget · 05d53165

David Crawshaw authored Apr 27, 2015

The underlying *bufio.Reader does everything that's needed here.

Change-Id: If0712a5b4d3142ae4bceaa2efe287eaf2b91e54e
Reviewed-on: https://go-review.googlesource.com/9365Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

05d53165

doc/go1.5.txt: mention goroutine scheduling change · cbbe9f63

Russ Cox authored Apr 27, 2015

Change-Id: I43a40f0c10472b3126c06b0d4268b32b54665f12
Reviewed-on: https://go-review.googlesource.com/9349Reviewed-by: Rob Pike <r@golang.org>

cbbe9f63

Revert "Revert "cmd/dist: consolidate runtime CPU tests"" · 45ccea71

Josh Bleecher Snyder authored Apr 27, 2015

This reverts commit 81c2233b.

Change-Id: Ie7024f04dba6352ae79ba68d4da5c0c25844cd8c
Reviewed-on: https://go-review.googlesource.com/9397Reviewed-by: Dave Cheney <dave@cheney.net>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

45ccea71

cmd/internal/gc: emit typedmemmove write barrier from sgen · 2a735590

Russ Cox authored Apr 17, 2015

Emitting it here instead of rewriting the tree earlier sets us up
to generate an inline check, like we do for single pointers.
But even without the inline check, generating at this level lets
us generate significantly more efficient code, probably due to
having fewer temporaries and less complex high-level code
for the compiler to churn through.

Revcomp is worse, almost certainly due to register pressure.

name old new delta
BenchmarkBinaryTree17 18.0s × (0.99,1.01) 18.0s × (0.99,1.01) ~
BenchmarkFannkuch11 4.43s × (1.00,1.00) 4.36s × (1.00,1.00) -1.44%
BenchmarkFmtFprintfEmpty 114ns × (0.95,1.05) 86ns × (0.97,1.06) -24.12%
BenchmarkFmtFprintfString 468ns × (0.99,1.01) 420ns × (0.99,1.02) -10.16%
BenchmarkFmtFprintfInt 433ns × (1.00,1.01) 386ns × (0.99,1.02) -10.74%
BenchmarkFmtFprintfIntInt 748ns × (0.99,1.01) 647ns × (0.99,1.01) -13.56%
BenchmarkFmtFprintfPrefixedInt 547ns × (0.99,1.01) 499ns × (0.99,1.02) -8.78%
BenchmarkFmtFprintfFloat 756ns × (1.00,1.01) 689ns × (1.00,1.00) -8.86%
BenchmarkFmtManyArgs 2.79µs × (1.00,1.01) 2.53µs × (1.00,1.00) -9.30%
BenchmarkGobDecode 39.6ms × (0.99,1.00) 39.2ms × (0.98,1.01) -1.07%
BenchmarkGobEncode 37.6ms × (1.00,1.01) 37.5ms × (0.99,1.01) ~
BenchmarkGzip 663ms × (0.99,1.02) 660ms × (0.98,1.01) ~
BenchmarkGunzip 142ms × (1.00,1.00) 143ms × (1.00,1.00) ~
BenchmarkHTTPClientServer 132µs × (0.99,1.01) 133µs × (0.99,1.02) ~
BenchmarkJSONEncode 56.2ms × (0.99,1.01) 54.0ms × (0.98,1.01) -3.97%
BenchmarkJSONDecode 138ms × (1.00,1.00) 134ms × (0.99,1.02) -2.70%
BenchmarkMandelbrot200 6.03ms × (1.00,1.01) 6.00ms × (1.00,1.01) ~
BenchmarkGoParse 9.82ms × (0.93,1.10) 10.35ms × (0.88,1.11) ~
BenchmarkRegexpMatchEasy0_32 207ns × (1.00,1.00) 163ns × (0.99,1.01) -21.26%
BenchmarkRegexpMatchEasy0_1K 581ns × (1.00,1.01) 566ns × (0.99,1.00) -2.50%
BenchmarkRegexpMatchEasy1_32 185ns × (0.99,1.01) 138ns × (1.00,1.01) -25.41%
BenchmarkRegexpMatchEasy1_1K 975ns × (1.00,1.01) 892ns × (1.00,1.00) -8.51%
BenchmarkRegexpMatchMedium_32 328ns × (0.99,1.00) 252ns × (1.00,1.00) -23.17%
BenchmarkRegexpMatchMedium_1K 88.6µs × (1.00,1.01) 73.0µs × (1.00,1.01) -17.66%
BenchmarkRegexpMatchHard_32 4.69µs × (0.95,1.03) 3.85µs × (1.00,1.01) -17.91%
BenchmarkRegexpMatchHard_1K 133µs × (1.00,1.01) 117µs × (1.00,1.00) -12.34%
BenchmarkRevcomp 902ms × (0.99,1.05) 1001ms × (0.94,1.01) +11.04%
BenchmarkTemplate 174ms × (0.99,1.01) 160ms × (0.99,1.01) -7.70%
BenchmarkTimeParse 639ns × (1.00,1.00) 622ns × (1.00,1.00) -2.66%
BenchmarkTimeFormat 736ns × (1.00,1.01) 736ns × (1.00,1.02) ~

Change-Id: Ib3bbeb379f5f4819e6f5dcf69bc88a2b7ed41460
Reviewed-on: https://go-review.googlesource.com/9225Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Russ Cox <rsc@golang.org>

2a735590

cmd/internal/gc: inline writeBarrierEnabled check before calling writebarrierptr · 653d5607

Russ Cox authored Apr 24, 2015

I believe the benchmarks that get slower are under register pressure,
and not making the call unconditionally makes the pressure worse,
and the register allocator doesn't do a great job. But part of the point
of this sequence is to get the write barriers out of the way so I can work
on the register allocator, so that's okay.

name old new delta
BenchmarkBinaryTree17 17.9s × (1.00,1.01) 18.0s × (0.99,1.01) ~
BenchmarkFannkuch11 4.43s × (1.00,1.00) 4.43s × (1.00,1.00) ~
BenchmarkFmtFprintfEmpty 110ns × (1.00,1.06) 114ns × (0.95,1.05) ~
BenchmarkFmtFprintfString 487ns × (0.99,1.00) 468ns × (0.99,1.01) -4.00%
BenchmarkFmtFprintfInt 450ns × (0.99,1.00) 433ns × (1.00,1.01) -3.88%
BenchmarkFmtFprintfIntInt 762ns × (1.00,1.00) 748ns × (0.99,1.01) -1.84%
BenchmarkFmtFprintfPrefixedInt 584ns × (0.99,1.01) 547ns × (0.99,1.01) -6.26%
BenchmarkFmtFprintfFloat 738ns × (1.00,1.00) 756ns × (1.00,1.01) +2.37%
BenchmarkFmtManyArgs 2.80µs × (1.00,1.01) 2.79µs × (1.00,1.01) ~
BenchmarkGobDecode 39.0ms × (0.99,1.00) 39.6ms × (0.99,1.00) +1.54%
BenchmarkGobEncode 37.8ms × (0.98,1.01) 37.6ms × (1.00,1.01) ~
BenchmarkGzip 661ms × (0.99,1.01) 663ms × (0.99,1.02) ~
BenchmarkGunzip 142ms × (1.00,1.00) 142ms × (1.00,1.00) ~
BenchmarkHTTPClientServer 132µs × (0.99,1.01) 132µs × (0.99,1.01) ~
BenchmarkJSONEncode 56.3ms × (0.99,1.01) 56.2ms × (0.99,1.01) ~
BenchmarkJSONDecode 138ms × (0.99,1.01) 138ms × (1.00,1.00) ~
BenchmarkMandelbrot200 6.01ms × (1.00,1.00) 6.03ms × (1.00,1.01) +0.23%
BenchmarkGoParse 10.2ms × (0.87,1.05) 9.8ms × (0.93,1.10) ~
BenchmarkRegexpMatchEasy0_32 208ns × (1.00,1.00) 207ns × (1.00,1.00) ~
BenchmarkRegexpMatchEasy0_1K 588ns × (1.00,1.00) 581ns × (1.00,1.01) -1.27%
BenchmarkRegexpMatchEasy1_32 182ns × (0.99,1.01) 185ns × (0.99,1.01) +1.65%
BenchmarkRegexpMatchEasy1_1K 986ns × (1.00,1.01) 975ns × (1.00,1.01) -1.17%
BenchmarkRegexpMatchMedium_32 323ns × (1.00,1.01) 328ns × (0.99,1.00) +1.55%
BenchmarkRegexpMatchMedium_1K 89.9µs × (1.00,1.00) 88.6µs × (1.00,1.01) -1.38%
BenchmarkRegexpMatchHard_32 4.72µs × (0.95,1.01) 4.69µs × (0.95,1.03) ~
BenchmarkRegexpMatchHard_1K 133µs × (1.00,1.01) 133µs × (1.00,1.01) ~
BenchmarkRevcomp 900ms × (1.00,1.05) 902ms × (0.99,1.05) ~
BenchmarkTemplate 168ms × (0.99,1.01) 174ms × (0.99,1.01) +3.30%
BenchmarkTimeParse 637ns × (1.00,1.00) 639ns × (1.00,1.00) +0.31%
BenchmarkTimeFormat 738ns × (1.00,1.00) 736ns × (1.00,1.01) ~

Change-Id: I03ce152852edec404538f6c20eb650fac82e2aa2
Reviewed-on: https://go-review.googlesource.com/9224Reviewed-by: Austin Clements <austin@google.com>

653d5607

runtime: replace needwb() with writeBarrierEnabled · 32d6fbcb

Russ Cox authored Apr 24, 2015

Reduce the write barrier check to a single load and compare
so that it can be inlined into write barrier use sites.
Makes the standard write barrier a little faster too.

name old new delta
BenchmarkBinaryTree17 17.9s × (0.99,1.01) 17.9s × (1.00,1.01) ~
BenchmarkFannkuch11 4.35s × (1.00,1.00) 4.43s × (1.00,1.00) +1.81%
BenchmarkFmtFprintfEmpty 120ns × (0.93,1.06) 110ns × (1.00,1.06) -7.92%
BenchmarkFmtFprintfString 479ns × (0.99,1.00) 487ns × (0.99,1.00) +1.67%
BenchmarkFmtFprintfInt 452ns × (0.99,1.02) 450ns × (0.99,1.00) ~
BenchmarkFmtFprintfIntInt 766ns × (0.99,1.01) 762ns × (1.00,1.00) ~
BenchmarkFmtFprintfPrefixedInt 576ns × (0.98,1.01) 584ns × (0.99,1.01) ~
BenchmarkFmtFprintfFloat 730ns × (1.00,1.01) 738ns × (1.00,1.00) +1.16%
BenchmarkFmtManyArgs 2.84µs × (0.99,1.00) 2.80µs × (1.00,1.01) -1.22%
BenchmarkGobDecode 39.3ms × (0.98,1.01) 39.0ms × (0.99,1.00) ~
BenchmarkGobEncode 39.5ms × (0.99,1.01) 37.8ms × (0.98,1.01) -4.33%
BenchmarkGzip 663ms × (1.00,1.01) 661ms × (0.99,1.01) ~
BenchmarkGunzip 143ms × (1.00,1.00) 142ms × (1.00,1.00) ~
BenchmarkHTTPClientServer 132µs × (0.99,1.01) 132µs × (0.99,1.01) ~
BenchmarkJSONEncode 57.4ms × (0.99,1.01) 56.3ms × (0.99,1.01) -1.96%
BenchmarkJSONDecode 139ms × (0.99,1.00) 138ms × (0.99,1.01) ~
BenchmarkMandelbrot200 6.03ms × (1.00,1.00) 6.01ms × (1.00,1.00) ~
BenchmarkGoParse 10.3ms × (0.89,1.14) 10.2ms × (0.87,1.05) ~
BenchmarkRegexpMatchEasy0_32 209ns × (1.00,1.00) 208ns × (1.00,1.00) ~
BenchmarkRegexpMatchEasy0_1K 591ns × (0.99,1.00) 588ns × (1.00,1.00) ~
BenchmarkRegexpMatchEasy1_32 184ns × (0.99,1.02) 182ns × (0.99,1.01) ~
BenchmarkRegexpMatchEasy1_1K 1.01µs × (1.00,1.00) 0.99µs × (1.00,1.01) -2.33%
BenchmarkRegexpMatchMedium_32 330ns × (1.00,1.00) 323ns × (1.00,1.01) -2.12%
BenchmarkRegexpMatchMedium_1K 92.6µs × (1.00,1.00) 89.9µs × (1.00,1.00) -2.92%
BenchmarkRegexpMatchHard_32 4.80µs × (0.95,1.00) 4.72µs × (0.95,1.01) ~
BenchmarkRegexpMatchHard_1K 136µs × (1.00,1.00) 133µs × (1.00,1.01) -1.86%
BenchmarkRevcomp 900ms × (0.99,1.04) 900ms × (1.00,1.05) ~
BenchmarkTemplate 172ms × (1.00,1.00) 168ms × (0.99,1.01) -2.07%
BenchmarkTimeParse 637ns × (1.00,1.00) 637ns × (1.00,1.00) ~
BenchmarkTimeFormat 744ns × (1.00,1.01) 738ns × (1.00,1.00) -0.67%

Change-Id: I4ecc925805da1f5ee264377f1f7574f54ee575e7
Reviewed-on: https://go-review.googlesource.com/9321Reviewed-by: Austin Clements <austin@google.com>

32d6fbcb

runtime: change unused argument in fat write barriers from pointer to scalar · 2050f571

Russ Cox authored Apr 24, 2015

The argument is unused, only present for alignment of the
following argument. The compiler today always passes a zero
but I'd rather not write anything there during the call sequence,
so mark it as a scalar so the garbage collector won't look at it.

As expected, no significant performance change.

name old new delta
BenchmarkBinaryTree17 17.9s × (0.99,1.00) 17.9s × (0.99,1.01) ~
BenchmarkFannkuch11 4.35s × (1.00,1.00) 4.35s × (1.00,1.00) ~
BenchmarkFmtFprintfEmpty 120ns × (0.94,1.05) 120ns × (0.93,1.06) ~
BenchmarkFmtFprintfString 477ns × (1.00,1.00) 479ns × (0.99,1.00) ~
BenchmarkFmtFprintfInt 450ns × (0.99,1.01) 452ns × (0.99,1.02) ~
BenchmarkFmtFprintfIntInt 765ns × (0.99,1.01) 766ns × (0.99,1.01) ~
BenchmarkFmtFprintfPrefixedInt 569ns × (0.99,1.01) 576ns × (0.98,1.01) ~
BenchmarkFmtFprintfFloat 728ns × (1.00,1.00) 730ns × (1.00,1.01) ~
BenchmarkFmtManyArgs 2.82µs × (0.99,1.01) 2.84µs × (0.99,1.00) ~
BenchmarkGobDecode 39.1ms × (0.99,1.01) 39.3ms × (0.98,1.01) ~
BenchmarkGobEncode 39.4ms × (0.99,1.01) 39.5ms × (0.99,1.01) ~
BenchmarkGzip 661ms × (0.99,1.01) 663ms × (1.00,1.01) ~
BenchmarkGunzip 143ms × (1.00,1.00) 143ms × (1.00,1.00) ~
BenchmarkHTTPClientServer 133µs × (0.99,1.01) 132µs × (0.99,1.01) ~
BenchmarkJSONEncode 57.3ms × (0.99,1.04) 57.4ms × (0.99,1.01) ~
BenchmarkJSONDecode 139ms × (0.99,1.00) 139ms × (0.99,1.00) ~
BenchmarkMandelbrot200 6.02ms × (1.00,1.00) 6.03ms × (1.00,1.00) ~
BenchmarkGoParse 9.72ms × (0.92,1.11) 10.31ms × (0.89,1.14) ~
BenchmarkRegexpMatchEasy0_32 209ns × (1.00,1.01) 209ns × (1.00,1.00) ~
BenchmarkRegexpMatchEasy0_1K 592ns × (0.99,1.00) 591ns × (0.99,1.00) ~
BenchmarkRegexpMatchEasy1_32 183ns × (0.98,1.01) 184ns × (0.99,1.02) ~
BenchmarkRegexpMatchEasy1_1K 1.01µs × (1.00,1.01) 1.01µs × (1.00,1.00) ~
BenchmarkRegexpMatchMedium_32 330ns × (1.00,1.00) 330ns × (1.00,1.00) ~
BenchmarkRegexpMatchMedium_1K 92.4µs × (1.00,1.00) 92.6µs × (1.00,1.00) ~
BenchmarkRegexpMatchHard_32 4.77µs × (0.95,1.01) 4.80µs × (0.95,1.00) ~
BenchmarkRegexpMatchHard_1K 136µs × (1.00,1.00) 136µs × (1.00,1.00) ~
BenchmarkRevcomp 906ms × (0.99,1.05) 900ms × (0.99,1.04) ~
BenchmarkTemplate 171ms × (0.99,1.01) 172ms × (1.00,1.00) ~
BenchmarkTimeParse 638ns × (1.00,1.00) 637ns × (1.00,1.00) ~
BenchmarkTimeFormat 745ns × (0.99,1.02) 744ns × (1.00,1.01) ~

Change-Id: I0aeac5dc7adfd75e2223e3aabfedc7818d339f9b
Reviewed-on: https://go-review.googlesource.com/9320Reviewed-by: Austin Clements <austin@google.com>

2050f571

cmd/internal/gc: accept comma-separated list of name=value for -d · 6c328efc

Russ Cox authored Apr 24, 2015

This should obviously have no performance impact.
Listing numbers just as a sanity check for the benchmark
comparison program: it should (and does) find nothing
to report.

name old new delta
BenchmarkBinaryTree17 18.0s × (0.99,1.01) 17.9s × (0.99,1.00) ~
BenchmarkFannkuch11 4.36s × (1.00,1.00) 4.35s × (1.00,1.00) ~
BenchmarkFmtFprintfEmpty 120ns × (0.99,1.06) 120ns × (0.94,1.05) ~
BenchmarkFmtFprintfString 480ns × (0.99,1.01) 477ns × (1.00,1.00) ~
BenchmarkFmtFprintfInt 451ns × (0.99,1.01) 450ns × (0.99,1.01) ~
BenchmarkFmtFprintfIntInt 766ns × (0.99,1.01) 765ns × (0.99,1.01) ~
BenchmarkFmtFprintfPrefixedInt 569ns × (0.99,1.01) 569ns × (0.99,1.01) ~
BenchmarkFmtFprintfFloat 728ns × (1.00,1.01) 728ns × (1.00,1.00) ~
BenchmarkFmtManyArgs 2.81µs × (1.00,1.01) 2.82µs × (0.99,1.01) ~
BenchmarkGobDecode 39.4ms × (0.99,1.01) 39.1ms × (0.99,1.01) ~
BenchmarkGobEncode 39.4ms × (0.99,1.00) 39.4ms × (0.99,1.01) ~
BenchmarkGzip 660ms × (1.00,1.01) 661ms × (0.99,1.01) ~
BenchmarkGunzip 143ms × (1.00,1.00) 143ms × (1.00,1.00) ~
BenchmarkHTTPClientServer 132µs × (0.99,1.01) 133µs × (0.99,1.01) ~
BenchmarkJSONEncode 57.1ms × (0.99,1.01) 57.3ms × (0.99,1.04) ~
BenchmarkJSONDecode 138ms × (1.00,1.01) 139ms × (0.99,1.00) ~
BenchmarkMandelbrot200 6.02ms × (1.00,1.00) 6.02ms × (1.00,1.00) ~
BenchmarkGoParse 9.79ms × (0.92,1.07) 9.72ms × (0.92,1.11) ~
BenchmarkRegexpMatchEasy0_32 210ns × (1.00,1.01) 209ns × (1.00,1.01) ~
BenchmarkRegexpMatchEasy0_1K 593ns × (0.99,1.01) 592ns × (0.99,1.00) ~
BenchmarkRegexpMatchEasy1_32 182ns × (0.99,1.01) 183ns × (0.98,1.01) ~
BenchmarkRegexpMatchEasy1_1K 1.01µs × (1.00,1.01) 1.01µs × (1.00,1.01) ~
BenchmarkRegexpMatchMedium_32 331ns × (1.00,1.00) 330ns × (1.00,1.00) ~
BenchmarkRegexpMatchMedium_1K 92.6µs × (1.00,1.01) 92.4µs × (1.00,1.00) ~
BenchmarkRegexpMatchHard_32 4.58µs × (0.99,1.05) 4.77µs × (0.95,1.01) ~
BenchmarkRegexpMatchHard_1K 136µs × (1.00,1.01) 136µs × (1.00,1.00) ~
BenchmarkRevcomp 900ms × (0.99,1.06) 906ms × (0.99,1.05) ~
BenchmarkTemplate 171ms × (1.00,1.01) 171ms × (0.99,1.01) ~
BenchmarkTimeParse 637ns × (1.00,1.00) 638ns × (1.00,1.00) ~
BenchmarkTimeFormat 742ns × (1.00,1.00) 745ns × (0.99,1.02) ~

Change-Id: I59ec875715cb176bbffa709546370a6a7fc5a75d
Reviewed-on: https://go-review.googlesource.com/9309Reviewed-by: Austin Clements <austin@google.com>

6c328efc

cmd/internal/gc: use MOV R0, R1 instead of LEA 0(R0), R1 in Agen · 0f0bc0f0

Russ Cox authored Apr 24, 2015

Minor code generation optimization I've been meaning to do
for a while and noticed while working on the emitted write
barrier code. Using MOV lets the compiler and maybe the
processor do copy propagation.

name old new delta
BenchmarkBinaryTree17 17.9s × (0.99,1.01) 18.0s × (0.99,1.01) ~
BenchmarkFannkuch11 4.42s × (1.00,1.00) 4.36s × (1.00,1.00) -1.39%
BenchmarkFmtFprintfEmpty 118ns × (0.96,1.02) 120ns × (0.99,1.06) ~
BenchmarkFmtFprintfString 486ns × (0.99,1.01) 480ns × (0.99,1.01) -1.34%
BenchmarkFmtFprintfInt 457ns × (0.99,1.01) 451ns × (0.99,1.01) -1.31%
BenchmarkFmtFprintfIntInt 768ns × (1.00,1.01) 766ns × (0.99,1.01) ~
BenchmarkFmtFprintfPrefixedInt 584ns × (0.99,1.03) 569ns × (0.99,1.01) -2.57%
BenchmarkFmtFprintfFloat 739ns × (0.99,1.00) 728ns × (1.00,1.01) -1.49%
BenchmarkFmtManyArgs 2.77µs × (1.00,1.00) 2.81µs × (1.00,1.01) +1.53%
BenchmarkGobDecode 39.3ms × (0.99,1.01) 39.4ms × (0.99,1.01) ~
BenchmarkGobEncode 39.4ms × (0.99,1.00) 39.4ms × (0.99,1.00) ~
BenchmarkGzip 661ms × (0.99,1.01) 660ms × (1.00,1.01) ~
BenchmarkGunzip 142ms × (1.00,1.00) 143ms × (1.00,1.00) +0.20%
BenchmarkHTTPClientServer 133µs × (0.98,1.01) 132µs × (0.99,1.01) ~
BenchmarkJSONEncode 56.5ms × (0.99,1.01) 57.1ms × (0.99,1.01) +0.94%
BenchmarkJSONDecode 143ms × (1.00,1.00) 138ms × (1.00,1.01) -3.22%
BenchmarkMandelbrot200 6.01ms × (1.00,1.00) 6.02ms × (1.00,1.00) ~
BenchmarkGoParse 9.63ms × (0.94,1.07) 9.79ms × (0.92,1.07) ~
BenchmarkRegexpMatchEasy0_32 210ns × (1.00,1.00) 210ns × (1.00,1.01) ~
BenchmarkRegexpMatchEasy0_1K 596ns × (0.99,1.01) 593ns × (0.99,1.01) ~
BenchmarkRegexpMatchEasy1_32 184ns × (0.99,1.01) 182ns × (0.99,1.01) ~
BenchmarkRegexpMatchEasy1_1K 1.01µs × (0.99,1.01) 1.01µs × (1.00,1.01) ~
BenchmarkRegexpMatchMedium_32 327ns × (1.00,1.01) 331ns × (1.00,1.00) +1.22%
BenchmarkRegexpMatchMedium_1K 93.0µs × (1.00,1.02) 92.6µs × (1.00,1.01) ~
BenchmarkRegexpMatchHard_32 4.76µs × (0.95,1.01) 4.58µs × (0.99,1.05) ~
BenchmarkRegexpMatchHard_1K 136µs × (1.00,1.01) 136µs × (1.00,1.01) ~
BenchmarkRevcomp 892ms × (1.00,1.01) 900ms × (0.99,1.06) ~
BenchmarkTemplate 175ms × (0.99,1.00) 171ms × (1.00,1.01) -2.36%
BenchmarkTimeParse 638ns × (1.00,1.00) 637ns × (1.00,1.00) ~
BenchmarkTimeFormat 772ns × (1.00,1.00) 742ns × (1.00,1.00) -3.95%

Change-Id: I6504e310cb9cf48a73d539c478b4dbcacde208b2
Reviewed-on: https://go-review.googlesource.com/9308Reviewed-by: Austin Clements <austin@google.com>

0f0bc0f0

cmd/internal/gc: emit write barriers at lower level · 0ad4f8b1

Russ Cox authored Apr 17, 2015

This is primarily preparation for inlining, not an optimization by itself,
but it still helps some.

name old new delta
BenchmarkBinaryTree17 18.2s × (0.99,1.01) 17.9s × (0.99,1.01) -1.57%
BenchmarkFannkuch11 4.44s × (1.00,1.00) 4.42s × (1.00,1.00) -0.40%
BenchmarkFmtFprintfEmpty 119ns × (0.95,1.02) 118ns × (0.96,1.02) ~
BenchmarkFmtFprintfString 501ns × (0.99,1.02) 486ns × (0.99,1.01) -2.89%
BenchmarkFmtFprintfInt 474ns × (0.99,1.00) 457ns × (0.99,1.01) -3.59%
BenchmarkFmtFprintfIntInt 792ns × (1.00,1.00) 768ns × (1.00,1.01) -3.03%
BenchmarkFmtFprintfPrefixedInt 574ns × (1.00,1.01) 584ns × (0.99,1.03) +1.83%
BenchmarkFmtFprintfFloat 749ns × (1.00,1.00) 739ns × (0.99,1.00) -1.34%
BenchmarkFmtManyArgs 2.94µs × (1.00,1.01) 2.77µs × (1.00,1.00) -5.76%
BenchmarkGobDecode 39.5ms × (0.99,1.01) 39.3ms × (0.99,1.01) ~
BenchmarkGobEncode 39.4ms × (1.00,1.01) 39.4ms × (0.99,1.00) ~
BenchmarkGzip 658ms × (1.00,1.01) 661ms × (0.99,1.01) ~
BenchmarkGunzip 142ms × (1.00,1.00) 142ms × (1.00,1.00) +0.22%
BenchmarkHTTPClientServer 134µs × (0.99,1.01) 133µs × (0.98,1.01) ~
BenchmarkJSONEncode 57.1ms × (0.99,1.01) 56.5ms × (0.99,1.01) ~
BenchmarkJSONDecode 141ms × (1.00,1.00) 143ms × (1.00,1.00) +1.09%
BenchmarkMandelbrot200 6.01ms × (1.00,1.00) 6.01ms × (1.00,1.00) ~
BenchmarkGoParse 10.1ms × (0.91,1.09) 9.6ms × (0.94,1.07) ~
BenchmarkRegexpMatchEasy0_32 207ns × (1.00,1.01) 210ns × (1.00,1.00) +1.45%
BenchmarkRegexpMatchEasy0_1K 592ns × (0.99,1.00) 596ns × (0.99,1.01) +0.68%
BenchmarkRegexpMatchEasy1_32 184ns × (0.99,1.01) 184ns × (0.99,1.01) ~
BenchmarkRegexpMatchEasy1_1K 1.01µs × (1.00,1.00) 1.01µs × (0.99,1.01) ~
BenchmarkRegexpMatchMedium_32 327ns × (0.99,1.00) 327ns × (1.00,1.01) ~
BenchmarkRegexpMatchMedium_1K 92.5µs × (1.00,1.00) 93.0µs × (1.00,1.02) +0.48%
BenchmarkRegexpMatchHard_32 4.79µs × (0.95,1.00) 4.76µs × (0.95,1.01) ~
BenchmarkRegexpMatchHard_1K 136µs × (1.00,1.00) 136µs × (1.00,1.01) ~
BenchmarkRevcomp 900ms × (0.99,1.01) 892ms × (1.00,1.01) ~
BenchmarkTemplate 170ms × (0.99,1.01) 175ms × (0.99,1.00) +2.95%
BenchmarkTimeParse 645ns × (1.00,1.00) 638ns × (1.00,1.00) -1.16%
BenchmarkTimeFormat 740ns × (1.00,1.00) 772ns × (1.00,1.00) +4.39%

Change-Id: I0be905e32791e0cb70ff01f169c4b309a971d981
Reviewed-on: https://go-review.googlesource.com/9159Reviewed-by: Rick Hudson <rlh@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

0ad4f8b1

test: gofmt run.go · 673bd188

Josh Bleecher Snyder authored Apr 27, 2015

Clean up after CL 5310.

Change-Id: Ib870e7b9d26eb118eefdaa3e76dcec4a4d459584
Reviewed-on: https://go-review.googlesource.com/9398Reviewed-by: Ian Lance Taylor <iant@golang.org>

673bd188

test: set GOMAXPROCS=1 in fixedbugs/issue9110 · 1fb948a0

Josh Bleecher Snyder authored Apr 27, 2015

With this fix,

GOMAXPROCS=8 ./all.bash

passes, at least on my machine.

Fixes #10216.

Change-Id: Ib5991950892a1399ec81aced0a52b435e6f83fdf
Reviewed-on: https://go-review.googlesource.com/9392Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

1fb948a0

net: don't miss testing server teardowns when test fails early · 9bef5cfb

Mikio Hara authored Apr 25, 2015

Change-Id: I9fa678e43b4ae3970323cac474b5f86d4d933997
Reviewed-on: https://go-review.googlesource.com/9382Reviewed-by: Ian Lance Taylor <iant@golang.org>

9bef5cfb

27 Apr, 2015 5 commits

test: reenable syntax tests · 8a413752

Matthew Dempsky authored Apr 27, 2015

These were fixed a little while ago, but overlooked when reenabling
disabled tests.

Update #9968.

Change-Id: I301ef587e580c517a170ad08ff897118b58cedec
Reviewed-on: https://go-review.googlesource.com/9347
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

8a413752

doc/go1.5.txt: go doc · 181e81cf

Rob Pike authored Apr 27, 2015

Change-Id: I883017b67e8fa76b6f123e8f9bcec3d6f820bbb3
Reviewed-on: https://go-review.googlesource.com/9348Reviewed-by: Rob Pike <r@golang.org>

181e81cf

cmd/go,cmd/doc: add "go doc" · a5de54a8

Rob Pike authored Apr 24, 2015

Add the new go doc command to the go command, installed in
the tool directory.

(Still to do: tests)

Fix cmd/dist to remove old "package documentation" code that was
stopping it from including cmd/go/doc.go in the build.

Implement the doc command. Here is the help info from "go help doc":

===
usage: go doc [-u] [package|[package.]symbol[.method]]

Doc accepts at most one argument, indicating either a package, a symbol within a
package, or a method of a symbol.

	go doc
	go doc <pkg>
	go doc <sym>[.<method>]
	go doc [<pkg>].<sym>[.<method>]

Doc interprets the argument to see what it represents, determined by its syntax
and which packages and symbols are present in the source directories of GOROOT and
GOPATH.

The first item in this list that succeeds is the one whose documentation is printed.
For packages, the order of scanning is determined by the file system, however the
GOROOT tree is always scanned before GOPATH.

If there is no package specified or matched, the package in the current directory
is selected, so "go doc" shows the documentation for the current package and
"go doc Foo" shows the documentation for symbol Foo in the current package.

Doc prints the documentation comments associated with the top-level item the
argument identifies (package, type, method) followed by a one-line summary of each
of the first-level items "under" that item (package-level declarations for a
package, methods for a type, etc.)

The package paths must be either a qualified path or a proper suffix of a path
(see examples below). The go tool's usual package mechanism does not apply: package
path elements like . and ...  are not implemented by go doc.

When matching symbols, lower-case letters match either case but upper-case letters
match exactly.

Examples:
	go doc
		Show documentation for current package.
	go doc Foo
		Show documentation for Foo in the current package.
		(Foo starts with a capital letter so it cannot match a package path.)
	go doc json
		Show documentation for the encoding/json package.
	go doc json
		Shorthand for encoding/json assuming only one json package
		is present in the tree.
	go doc json.Number (or go doc json.number)
		Show documentation and method summary for json.Number.
	go doc json.Number.Int64 (or go doc json.number.int64)
		Show documentation for the Int64 method of json.Number.

Flags:
	-u
		Show documentation for unexported as well as exported
		symbols and methods.

===

Still to do:

Tests.
Disambiguation when there is both foo and Foo.
Flag for case-sensitive matching.

Change-Id: I83d409a68688a5445f54297a7e7c745f749b9e66
Reviewed-on: https://go-review.googlesource.com/9227Reviewed-by: Russ Cox <rsc@golang.org>

a5de54a8

runtime/race: fix failing tests · 02ba71e5

Austin Clements authored Apr 27, 2015

Some race tests were sensitive to the goroutine scheduling order.
When this changed in commit e870f06c, these tests started to fail.

Fix TestRaceHeapParam by ensuring that the racing goroutine has
run before the test exits. Fix TestRaceRWMutexMultipleReaders by
adding a third reader to ensure that two readers wind up on the
same side of the writer (and race with each other) regardless of
the schedule. Fix TestRaceRange by ensuring that the racing
goroutine runs before the main goroutine exits the loop it races
with.

Change-Id: Iaf002f8730ea42227feaf2f3c51b9a1e57ccffdd
Reviewed-on: https://go-review.googlesource.com/9402Reviewed-by: Russ Cox <rsc@golang.org>

02ba71e5

runtime/race: stop listening to external network addresses · f774e6a1

Russ Cox authored Apr 27, 2015

This makes the OS X firewall box pop up.
Not run during all.bash so hasn't been noticed before.

Change-Id: I78feb4fd3e1d3c983ae3419085048831c04de3da
Reviewed-on: https://go-review.googlesource.com/9401Reviewed-by: Austin Clements <austin@google.com>

f774e6a1