The check for Stringer etc. can only fire if the test is not a builtin, so avoid
the expensive check if we know there's no chance.
Also put in a fast path for pad, which saves a more modest amount.
benchmark old ns/op new ns/op delta
BenchmarkSprintfEmpty 148 152 +2.70%
BenchmarkSprintfString 585 497 -15.04%
BenchmarkSprintfInt 441 396 -10.20%
BenchmarkSprintfIntInt 718 603 -16.02%
BenchmarkSprintfPrefixedInt 676 621 -8.14%
BenchmarkSprintfFloat 1003 953 -4.99%
BenchmarkManyArgs 2945 2312 -21.49%
BenchmarkScanInts 1704152 1734441 +1.78%
BenchmarkScanRecursiveInt 1837397 1828920 -0.46%
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6245068
This prevents clients from seeing RSTs and missing the response
body.
TCP stacks vary. The included test failed on Darwin before but
passed on Linux.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6256066
It was only being used for (*Stmt).Exec, not Query, and not for
the same two methods on *DB.
This unifies (*Stmt).Exec's old inline code into the old
subsetArgs function, renaming it in the process (changing the
old word "subset" to "driver", mostly converted earlier)
Fixes#3640
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6258045
It's sad to introduce a new macro, but rnd shows up consistently
in profiles, and the function call overwhelms the two arithmetic
instructions it performs.
R=r
CC=golang-dev
https://golang.org/cl/6260051
Plan 9 versions for amd64 have 2 megabyte pages.
This also fixes the logic for 32-bit vs 64-bit Plan 9,
making 64-bit the default, and adds logic to generate
a symbols table.
R=golang-dev, rsc, rminnich, ality, 0intro
CC=golang-dev, john
https://golang.org/cl/6218046
The old code generated for a bounds check was
CMP
JLT ok
CALL panicindex
ok:
...
The new code is (once the linker finishes with it):
CMP
JGE panic
...
panic:
CALL panicindex
which moves the calls out of line, putting more useful
code in each cache line. This matters especially in tight
loops, such as in Fannkuch. The benefit is more modest
elsewhere, but real.
From test/bench/go1, amd64:
benchmark old ns/op new ns/op delta
BenchmarkBinaryTree17 6096092000 6088808000 -0.12%
BenchmarkFannkuch11 6151404000 4020463000 -34.64%
BenchmarkGobDecode 28990050 28894630 -0.33%
BenchmarkGobEncode 12406310 12136730 -2.17%
BenchmarkGzip 179923 179903 -0.01%
BenchmarkGunzip 11219 11130 -0.79%
BenchmarkJSONEncode 86429350 86515900 +0.10%
BenchmarkJSONDecode 334593800 315728400 -5.64%
BenchmarkRevcomp25M 1219763000 1180767000 -3.20%
BenchmarkTemplate 492947600 483646800 -1.89%
And 386:
benchmark old ns/op new ns/op delta
BenchmarkBinaryTree17 6354902000 6243000000 -1.76%
BenchmarkFannkuch11 8043769000 7326965000 -8.91%
BenchmarkGobDecode 19010800 18941230 -0.37%
BenchmarkGobEncode 14077500 13792460 -2.02%
BenchmarkGzip 194087 193619 -0.24%
BenchmarkGunzip 12495 12457 -0.30%
BenchmarkJSONEncode 125636400 125451400 -0.15%
BenchmarkJSONDecode 696648600 685032800 -1.67%
BenchmarkRevcomp25M 2058088000 2052545000 -0.27%
BenchmarkTemplate 602140000 589876800 -2.04%
To implement this, two new instruction forms:
JLT target // same as always
JLT $0, target // branch expected not taken
JLT $1, target // branch expected taken
The linker could also emit the prediction prefixes, but it
does not: expected taken branches are reversed so that the
expected case is not taken (as in example above), and
the default expectaton for such a jump is not taken
already.
R=golang-dev, gri, r, dave
CC=golang-dev
https://golang.org/cl/6248049
Implement the (3-per-family) Noah's Ark clause (i.e. don't put
more than three identical elements on the list of active formatting
elements.
Also, when running tests, sort attributes by name before dumping
them.
Pass 4 additional tests with Noah's Ark clause (including one
that needs attributes to be sorted).
Pass 5 additional, unrelated tests because of sorting attributes.
R=nigeltao, rsc
CC=golang-dev
https://golang.org/cl/6247056
CanonicalHeaderKey didn't allocate, but it did use unnecessary
CPU in the hot path, deciding it didn't need to allocate.
I considered using constants for all these common header keys
but I didn't think it would be prettier. "Content-Length" looks
better than contentLength or hdrContentLength, etc.
R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/6255053
Comment on cache keys above connectMethod says "http to proxy, http
anywhere after that", however in reality target address was always
included, which prevented http requests to different target
addresses to reuse the same http proxy connection.
R=golang-dev, r, rsc, bradfitz
CC=golang-dev
https://golang.org/cl/5901064
CL 5956051 introduced too many call != nil checks, so
attempt to improve this by splitting logic into three
distinct parts.
R=r
CC=golang-dev
https://golang.org/cl/6248048
for expr1, expr2 = range slice
was assigning to expr1 and expr2 in sequence
instead of in parallel. Now it assigns in parallel,
as it should. This matters for things like
for i, x[i] = range slice.
Fixes#3464.
R=ken2
CC=golang-dev
https://golang.org/cl/6252048
This is from CL 5451105 but was dropped from that CL.
See also CL 6137051.
The only change compared to 5451105 is to check for
h != nil in reflect·mapiterinit; allowing use of nil maps
must have happened after that original CL.
Fixes#3573.
R=golang-dev, dave, r
CC=golang-dev
https://golang.org/cl/6215078
Remove redundant checks for integration points.
Ignore null bytes in text.
Don't break out of foreign content for a <font> tag unless it
has a color, face, or size attribute.
Check for MathML text integration points when breaking out of
foreign content.
Pass two new tests.
R=nigeltao
CC=golang-dev
https://golang.org/cl/6256045
The bulk of the gains come from hoisting the modulo ops outside of
the inner loop.
Reducing the digest type from 8 bytes to 4 bytes gains another 1% on
the hash/adler32 micro-benchmark.
Benchmarks for $GOOS,$GOARCH = linux,amd64 below.
hash/adler32 benchmark:
benchmark old ns/op new ns/op delta
BenchmarkAdler32KB 1660 1364 -17.83%
image/png benchmark:
benchmark old ns/op new ns/op delta
BenchmarkDecodeGray 2466909 2425539 -1.68%
BenchmarkDecodeNRGBAGradient 9884500 9751705 -1.34%
BenchmarkDecodeNRGBAOpaque 8511615 8379800 -1.55%
BenchmarkDecodePaletted 1366683 1330677 -2.63%
BenchmarkDecodeRGB 6987496 6884974 -1.47%
BenchmarkEncodePaletted 6292408 6040052 -4.01%
BenchmarkEncodeRGBOpaque 19780680 19178440 -3.04%
BenchmarkEncodeRGBA 80738600 79076800 -2.06%
Wall time for Denis Cheremisov's PNG-decoding program given in
https://groups.google.com/group/golang-nuts/browse_thread/thread/22aa8a05040fdd49
Before: 2.44s
After: 2.26s
Delta: -7%
R=rsc
CC=golang-dev
https://golang.org/cl/6251044
When client fails to write a request is sends caller that error,
however server might have failed to read that request in the mean
time and replied with that error. When client then reads the
response the call would no longer be pending, so call will be nil
Handle this gracefully by discarding such server responses
R=golang-dev, r
CC=golang-dev, rsc
https://golang.org/cl/5956051
* Eliminate bounds check on known small shifts.
* Rewrite x<<s | x>>(32-s) as a rotate (constant s).
* More aggressive (but still minimal) range analysis.
R=ken, dave, iant
CC=golang-dev
https://golang.org/cl/6209077
The previous attempt to explain this got it backwards (all the more reason to be
sad we couldn't make the two functions behave the same).
Fixes#3669.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6249051
There's no need for the 16-bit arithmetic here,
and it tickles a long-standing compiler bug.
Fix the exp code not to use 16-bit math and
create an explicit test for the compiler bug.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6256048
- interface methods appeared under VarDecl in search results
(long-standing TODO)
- don't walk parts of AST which contain no indexable material
(minor performance tuning)
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6228047
The documentation says so, but in the case of a normalized
integral Rat, the denominator was a new value. Changed the
internal representation to use an Int to represent the
denominator (with the sign ignored), so a reference to it
can always be returned.
Clarified documentation and added test cases.
Fixes#3521.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6237045
* Shift/rotate by constant doesn't have to stop subprop. (also in 8g)
* Remove redundant MOVLQZX instructions.
* An attempt at issuing loads early.
Good for 0.5% on a good day, might not be worth keeping.
Need to understand more about whether the x86
looks ahead to what loads might be coming up.
R=ken2, ken
CC=golang-dev
https://golang.org/cl/6203091
Detect HTML integration points and MathML text integration points.
At these points, process tokens as HTML, not as foreign content.
Pass 33 more tests.
R=nigeltao
CC=golang-dev
https://golang.org/cl/6249044
Import updated test data from the WebKit Subversion repository (SVN revision 118111).
Some of the old tests were failing because we were HTML5 compliant, but the tests weren't.
R=nigeltao
CC=golang-dev
https://golang.org/cl/6228049
I needed this to explore per-GOOS/GOARCH differences in pkg
syscall for a recent CL. Others may find it useful too.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6236046
- there is no label scope at package level
- open/close all scopes symmetrically now
that there is only one parse entry point
(parseFile)
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6230047
CL 5823055 removed a line introduced in Linux/ARM cgo support.
Because readsym() now returns nil for "$a", "$d" mapping symbols,
no matter the settings of `needSym', we still have to guard against
them in ldelf().
R=golang-dev, dave, rsc
CC=golang-dev
https://golang.org/cl/6220073
This quiets all.bash noise for upcoming features we know about.
The all.bash warnings will now only print for things not in next.txt
(or in next.txt but not in the API).
Once an API is frozen, we rename next.txt to a new frozen file
(like go1.txt)
Fixes#3651
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6218069
Handle text, comment, and doctype tokens in afterBodyIM, afterAfterBodyIM,
and afterAfterFramesetIM.
Pass three more tests.
R=nigeltao
CC=golang-dev
https://golang.org/cl/6231043
Also: simplified some existing tests.
No support for Rats for now because the precision-preserving
default notation (fractions of the form a/b) is not a valid
JSON value.
Fixes#3657.
R=golang-dev, bradfitz, rsc
CC=golang-dev
https://golang.org/cl/6211079
Currently, if you pass some data to a template as an interface (e.g. interface{})
and extract that value that value as a parameter for a function, it fails, saying
wrong type.
This is because it is only looking at the interface type, not the interface content.
This CL uses the underlying content as the parameter to the func.
Fixes#3642.
R=golang-dev, r, r
CC=golang-dev
https://golang.org/cl/6218052
Introduce a newsym() to cmd/lib.c to add a symbol but don't add
them to hash table.
Introduce a new bit flag SHIDDEN and bit mask SMASK to handle hidden
and/or local symbols in ELF symbol tables. Though we still need to order
the symbol table entries correctly.
Fix for issue 3261 comment #9.
For CL 5822049.
R=iant, rsc
CC=golang-dev
https://golang.org/cl/5823055
ld -r could generate multiple section symbols for the same section,
but with different values, we have to take that into account.
Fixes#3322.
Part of issue 3261.
For CL 5822049.
R=golang-dev, iant, rsc, iant
CC=golang-dev
https://golang.org/cl/5823059
Now that we've fixed the Expect: test, this CL should be okay.
««« original CL description
net/http: revert 97d027b3aa68
Revert the following change set:
changeset: 13018:97d027b3aa68
user: Gustavo Niemeyer <gustavo@niemeyer.net>
date: Mon Apr 23 22:00:16 2012 -0300
summary: net/http: allow clients to disable keep-alive
This broke a test on Windows 64 and somebody else
will have to check.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6112054
»»»
Fixes#3540.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6228046
In both the web and command line tool,
the comment is shown after the declaration.
But in the code the comment is obviously before.
Make the text not refer to a specific order.
R=r, dsymonds
CC=golang-dev
https://golang.org/cl/6206094
The speedup is a combination of unrolling/specializing
the actual code and also making the compiler generate better code.
Go 1.0.1 (size: 1239 code + 320 data = 1559 total)
md5.BenchmarkHash1K 1000000 7178 ns/op 142.64 MB/s
md5.BenchmarkHash8K 200000 56834 ns/op 144.14 MB/s
Partial unroll (size: 1115 code + 256 data = 1371 total)
md5.BenchmarkHash1K 5000000 2513 ns/op 407.37 MB/s
md5.BenchmarkHash8K 500000 19406 ns/op 422.13 MB/s
Complete unroll (size: 1900 code + 0 data = 1900 code)
md5.BenchmarkHash1K 5000000 2442 ns/op 419.18 MB/s
md5.BenchmarkHash8K 500000 18957 ns/op 432.13 MB/s
Comparing Go 1.0.1 and the complete unroll (this CL):
benchmark old MB/s new MB/s speedup
md5.BenchmarkHash1K 142.64 419.18 2.94x
md5.BenchmarkHash8K 144.14 432.13 3.00x
On the same machine, 'openssl speed md5' reports 441 MB/s
and 531 MB/s for our two cases, so this CL is at 90% and 80% of
those speeds, which is at least in the right ballpark.
OpenSSL is using carefully engineered assembly, so we are
unlikely to catch up completely.
Measurements on a Mid-2010 MacPro5,1.
R=golang-dev, bradfitz, agl
CC=golang-dev
https://golang.org/cl/6220046
This just eliminates some duplication.
Also add a pointer to RFC 1122, in case
this comes up again.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6229044
Fail more usefully, and Logf in one place instead of Errorf where
an error is acceptable.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6221059
Comment groups must end at the end of a line (or the
next non-comment token) if the group started on a line
with non-comment tokens.
This is important for correct computation of "lead"
and "line" comments (Doc and Comment fields in AST nodes).
Without this fix, the "line" comment for F1 in the
following example:
type T struct {
F1 int // comment1
// comment2
F2 int
}
is "// comment1// comment2" rather than just "// comment1".
This bug was present from Day 1 but only visible when
looking at export-filtered ASTs where only comments
associated with AST nodes are printed, and only in rare
cases (e.g, in the case above, if F2 where not exported,
godoc would show "// comment2" anyway because it was
considered part of the "line" comment for F1).
The bug fix is very small (parser.go). The bulk of the
changes are additional test cases (parser_test.go).
The fix exposed a caching bug in go/printer via one of the
existing tests, hence the changes to printer.go.
As an aside, the fix removes the the need for empty lines
before an "// Output" comment for some special cases of
code examples (e.g.: src/pkg/strings/example_test.go, Count
example).
No impact on gofmt formatting of src, misc.
Fixes#3139.
R=rsc
CC=golang-dev
https://golang.org/cl/6209080
This includes the NIST test suite for ECDSA and alters the test to
parse and evaluate it.
R=golang-dev, bradfitz, rsc, b
CC=golang-dev
https://golang.org/cl/6219058
This fixes occasional 64-bit failures.
Maybe it will fix the 32-bit failures too,
so re-enable on 32-bit for now.
R=golang-dev, bradfitz, r, dvyukov
CC=golang-dev
https://golang.org/cl/6218050
Clean up flow of control.
Ignore </table>, </tbody>, </tfoot>, </thead>, </tr> if there is not
an appropriate element in table scope.
Pass 3 more tests.
R=golang-dev, nigeltao
CC=golang-dev
https://golang.org/cl/6206093
http://www.rsa.com/rsalabs/node.asp?id=2125:
NOTE: A new OID has been defined for the combination
of the v1.5 signature scheme and the SHA-224 hash function:
sha224WithRSAEncryption OBJECT IDENTIFIER ::=
Like the other sha*WithRSAEncryption OIDs in PKCS #1 v2.1,
this OID has NULL parameters.
The DigestInfo encoding for SHA-224 (see Section 9.2, Note 1) is:
(0x)30 2d 30 0d 06 09 60 86 48 01 65 03 04 02 04 05 00 04 1c || H
R=golang-dev, agl
CC=golang-dev
https://golang.org/cl/6208076
The main content of this CL is a test case checking the reported
issue 3511 and a tiny fix for it. A subsequent CL will refactor
the fix as proposed issue 3511.
Fixes#3511.
R=golang-dev, steven.hartland, bradfitz
CC=golang-dev
https://golang.org/cl/6013049
Two tests added in 820ffde8c are expected to fail until the fix
for Issue 3540 goes back in (pending Windows net fixes), so
make those tests just Logf for now, with a TODO to re-enable.
Add a new client test.
Rearrange the transport code to be more readable, and fix the
bug from 820ffde8c where the persistConn was being closed before
the body was fully ready.
Fixes#3644
Updates #1967 (not yet fixed, but should be after Issue 3540)
R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/6211069
RawSockaddrDatalink and SockaddrDatalink need to match - make Data
have length 12 for both.
R=golang-dev, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/6223051
