database/sql: add currently-disabled broken test

Update issue 3865

R=golang-dev, alex.brainman, nightlyone
CC=golang-dev
https://codereview.appspot.com/7324051
cmd/5l: fix print format

R=golang-dev, dave
CC=golang-dev
https://codereview.appspot.com/7304065

Committer: Russ Cox <rsc@golang.org>
io: document and test new CopyN return behavior

Changed accidentally in 28966b7b2f0c (CopyN using Copy).
Updating docs to be consistent with 29bf5ff5064e (ReadFull & ReadAtLeast)

R=rsc
CC=golang-dev
https://codereview.appspot.com/7314069
net: add test for Dial and Listen arguments

R=dave, bradfitz
CC=golang-dev
https://codereview.appspot.com/7305081
net: remove noisy test for issue 3590

The test for issue 3590 causes an error to be printed to stderr when run (although the error is obscured during go test std). This is confusing for people who get breakage in the net package as the error is harmless and most likely unrelated to their build breakage.

Given the way the test works, by reaching into the guts of the netFD, I can't see a way to silence the error without adding a bunch of code to support the test, therefore I am suggesting the test be removed before Go 1.1 ships.

R=alex.brainman, mikioh.mikioh, rsc
CC=golang-dev
https://codereview.appspot.com/7307110
database/sql: Add an optional Queryer-Interface (like Execer)

Completly the same like the Execer-Interface, just for Queries.
This allows Drivers to execute Queries without preparing them first

R=golang-dev, bradfitz
CC=golang-dev
https://codereview.appspot.com/7085056

Committer: Brad Fitzpatrick <bradfitz@golang.org>
cmd/8c: disable use of prefetch with GO386=387

Fixes issue 4798.

R=ken2
CC=golang-dev
https://codereview.appspot.com/7323061
net/http: test that we preserve Go 1.0 Request.Write Host behavior

Fixes issue 4792

R=golang-dev, rsc
CC=golang-dev
https://codereview.appspot.com/7314093
database/sql: fix doc references to old package name

It used to be package "db" but was long ago renamed
to be "sql".

R=golang-dev, rsc
CC=golang-dev
https://codereview.appspot.com/7322075
runtime: tweak addfinroots to preserve original pointer

Use local variable so that stack trace will show value of v.

Fixes issue 4790.

R=golang-dev, iant
CC=golang-dev
https://codereview.appspot.com/7300106
cmd/vet: drop column information from error

The column information can be misleading.

R=golang-dev, dsymonds, r
CC=golang-dev
https://codereview.appspot.com/7300100
sort: use fewer comparisons when choosing pivot.

This is based on rsc's code posted to issue 2585.

Benchmark results are greatly improved:
        benchmark                old ns/op    new ns/op    delta
        BenchmarkSortString1K       564397       445897  -21.00%
        BenchmarkSortInt1K          270889       221249  -18.32%
        BenchmarkSortInt64K       26850765     21351967  -20.48%

Eyeballing a sampling of the raw number of comparisons shows a drop
on the order of 20-30% almost everywhere. The test input data that
doesn't match that are some of sawtooth/rand/plateau distributions,
where there is no change in the number of comparisons; that is,
there are no situations where this makes *more* comparisons.

Fixes issue 2585.

R=iant, rsc
CC=golang-dev
https://codereview.appspot.com/7306098
archive/tar: add Header.FileInfo method. Add more cases to FileInfoHeader.

FileInfoHeader can now handle fifo, setuid, setgid and sticky bits.

Fixes issue 4695.

R=golang-dev, donovanhide, r.eklind.87, minux.ma, adg
CC=golang-dev
https://codereview.appspot.com/7305072

Committer: Andrew Gerrand <adg@golang.org>
net/textproto: more efficient header parsing

A co creation with bradfitz

* add fast path for header lines which are not continuations
* pass hint to better size initial mime header map

lucky(~/go/src/pkg/net/http) % ~/go/misc/benchcmp {golden,new}.txt
benchmark                          old ns/op    new ns/op    delta
BenchmarkReadRequestChrome             10073         8348  -17.12%
BenchmarkReadRequestCurl                4368         4350   -0.41%
BenchmarkReadRequestApachebench         4412         4397   -0.34%
BenchmarkReadRequestSiege               6431         5924   -7.88%
BenchmarkReadRequestWrk                 2820         3146  +11.56%

benchmark                           old MB/s     new MB/s  speedup
BenchmarkReadRequestChrome             60.66        73.18    1.21x
BenchmarkReadRequestCurl               17.85        17.93    1.00x
BenchmarkReadRequestApachebench        18.58        18.65    1.00x
BenchmarkReadRequestSiege              23.48        25.49    1.09x
BenchmarkReadRequestWrk                14.18        12.71    0.90x

benchmark                         old allocs   new allocs    delta
BenchmarkReadRequestChrome                32           26  -18.75%
BenchmarkReadRequestCurl                  15           15    0.00%
BenchmarkReadRequestApachebench           16           15   -6.25%
BenchmarkReadRequestSiege                 22           19  -13.64%
BenchmarkReadRequestWrk                   11           11    0.00%

benchmark                          old bytes    new bytes    delta
BenchmarkReadRequestChrome              3148         2216  -29.61%
BenchmarkReadRequestCurl                 905         1413   56.13%
BenchmarkReadRequestApachebench          956         1413   47.80%
BenchmarkReadRequestSiege               1397         1522    8.95%
BenchmarkReadRequestWrk                  757         1369   80.85%

R=bradfitz
CC=golang-dev
https://codereview.appspot.com/7300098
runtime: move stack management related code to stack.c
No code changes.
This is mainly in preparation to scheduler changes,
oldstack/newstack are not related to scheduling.

R=golang-dev, minux.ma, rsc
CC=golang-dev
https://codereview.appspot.com/7311085
exp/cookiejar: implement Cookies and provided tests

This CL provides the implementation of Cookies and
the complete test suite. Several tests have been ported
from the Chromium project as a cross check.

R=nigeltao, rsc, bradfitz
CC=golang-dev
https://codereview.appspot.com/7311073

Committer: Nigel Tao <nigeltao@golang.org>