compress/flate: benchmark some English text, not just the digits of e.

The testdata/e.txt input is repeated on the longer benchmarks, but the
length of that data is less than flate's window size, so the numbers are
essentially measuring the performance of a trivial compression. A follow-up
CL will add more data to testdata/e.txt.

Sample output on my laptop (linux, amd64):

BenchmarkDecodeDigitsSpeed1e4	    5000	    603153 ns/op	  16.58 MB/s
BenchmarkDecodeDigitsSpeed1e5	    1000	   1465602 ns/op	  68.23 MB/s
BenchmarkDecodeDigitsSpeed1e6	     200	   8036050 ns/op	 124.44 MB/s
BenchmarkDecodeDigitsDefault1e4	    5000	    581796 ns/op	  17.19 MB/s
BenchmarkDecodeDigitsDefault1e5	    2000	    846653 ns/op	 118.11 MB/s
BenchmarkDecodeDigitsDefault1e6	     500	   3385782 ns/op	 295.35 MB/s
BenchmarkDecodeDigitsCompress1e4	    5000	    581180 ns/op	  17.21 MB/s
BenchmarkDecodeDigitsCompress1e5	    2000	    846209 ns/op	 118.17 MB/s
BenchmarkDecodeDigitsCompress1e6	     500	   3386174 ns/op	 295.32 MB/s
BenchmarkDecodeTwainSpeed1e4	    5000	    643563 ns/op	  15.54 MB/s
BenchmarkDecodeTwainSpeed1e5	     500	   5418408 ns/op	  18.46 MB/s
BenchmarkDecodeTwainSpeed1e6	      50	  52277520 ns/op	  19.13 MB/s
BenchmarkDecodeTwainDefault1e4	    5000	    583551 ns/op	  17.14 MB/s
BenchmarkDecodeTwainDefault1e5	     500	   4443428 ns/op	  22.51 MB/s
BenchmarkDecodeTwainDefault1e6	      50	  41862080 ns/op	  23.89 MB/s
BenchmarkDecodeTwainCompress1e4	    5000	    583490 ns/op	  17.14 MB/s
BenchmarkDecodeTwainCompress1e5	     500	   4426356 ns/op	  22.59 MB/s
BenchmarkDecodeTwainCompress1e6	      50	  41657940 ns/op	  24.01 MB/s
BenchmarkEncodeDigitsSpeed1e4	    2000	   1230907 ns/op	   8.12 MB/s
BenchmarkEncodeDigitsSpeed1e5	    1000	   2319129 ns/op	  43.12 MB/s
BenchmarkEncodeDigitsSpeed1e6	     100	  12378950 ns/op	  80.78 MB/s
BenchmarkEncodeDigitsDefault1e4	    1000	   1597865 ns/op	   6.26 MB/s
BenchmarkEncodeDigitsDefault1e5	     500	   3163458 ns/op	  31.61 MB/s
BenchmarkEncodeDigitsDefault1e6	     100	  18770240 ns/op	  53.28 MB/s
BenchmarkEncodeDigitsCompress1e4	    1000	   1603461 ns/op	   6.24 MB/s
BenchmarkEncodeDigitsCompress1e5	     500	   3168766 ns/op	  31.56 MB/s
BenchmarkEncodeDigitsCompress1e6	     100	  18855830 ns/op	  53.03 MB/s
BenchmarkEncodeTwainSpeed1e4	    1000	   1338049 ns/op	   7.47 MB/s
BenchmarkEncodeTwainSpeed1e5	     500	   7341622 ns/op	  13.62 MB/s
BenchmarkEncodeTwainSpeed1e6	      50	  67484600 ns/op	  14.82 MB/s
BenchmarkEncodeTwainDefault1e4	    1000	   1778399 ns/op	   5.62 MB/s
BenchmarkEncodeTwainDefault1e5	     100	  23261810 ns/op	   4.30 MB/s
BenchmarkEncodeTwainDefault1e6	      10	 243533600 ns/op	   4.11 MB/s
BenchmarkEncodeTwainCompress1e4	    1000	   1795469 ns/op	   5.57 MB/s
BenchmarkEncodeTwainCompress1e5	      50	  29447140 ns/op	   3.40 MB/s
BenchmarkEncodeTwainCompress1e6	       5	 321686800 ns/op	   3.11 MB/s
ok  	compress/flate	89.246s

R=rsc, r
CC=golang-dev
http://codereview.appspot.com/6195055
compress/testdata: change {e,pi}.txt from 10k to 100k digits.

These files change from exactly 10003 bytes long to 100003: a digit,
a '.', 100k digits, and a '\n'.

The magic constants in compress/flate/deflate_test.go change since
deflateInflateStringTests checks that the compressed form of e.txt
is not 'too large'. I'm not exactly sure how these numbers were
originally calculated (they were introduced in codereview 5554066
"make lazy matching work"); perhaps krasin@golang.org can comment.
My change was to increase the first one (no compression) to a tight
bound, and multiply all the others by 10.

Benchcmp numbers for compress/flate and compress/lzw below. LZW's
window size of 4096 is less than 10k, so shows no significant change.
Flate's window size is 32768, between 10k and 100k, and so the .*1e5
and .*1e6 benchmarks show a dramatic drop, since the compressed forms
are no longer a trivial forward copy of 10k digits repeated over and
over, but should now be more representative of real world usage.

compress/flate:
benchmark                            old MB/s     new MB/s  speedup
BenchmarkDecodeDigitsSpeed1e4           16.58        16.52    1.00x
BenchmarkDecodeDigitsSpeed1e5           68.09        18.10    0.27x
BenchmarkDecodeDigitsSpeed1e6          124.63        18.35    0.15x
BenchmarkDecodeDigitsDefault1e4         17.21        17.12    0.99x
BenchmarkDecodeDigitsDefault1e5        118.28        19.19    0.16x
BenchmarkDecodeDigitsDefault1e6        295.62        20.52    0.07x
BenchmarkDecodeDigitsCompress1e4        17.22        17.17    1.00x
BenchmarkDecodeDigitsCompress1e5       118.19        19.21    0.16x
BenchmarkDecodeDigitsCompress1e6       295.59        20.55    0.07x
BenchmarkEncodeDigitsSpeed1e4            8.18         8.19    1.00x
BenchmarkEncodeDigitsSpeed1e5           43.22        12.84    0.30x
BenchmarkEncodeDigitsSpeed1e6           80.76        13.48    0.17x
BenchmarkEncodeDigitsDefault1e4          6.29         6.19    0.98x
BenchmarkEncodeDigitsDefault1e5         31.63         3.60    0.11x
BenchmarkEncodeDigitsDefault1e6         52.97         3.24    0.06x
BenchmarkEncodeDigitsCompress1e4         6.20         6.19    1.00x
BenchmarkEncodeDigitsCompress1e5        31.59         3.59    0.11x
BenchmarkEncodeDigitsCompress1e6        53.18         3.25    0.06x

compress/lzw:
benchmark               old MB/s     new MB/s  speedup
BenchmarkDecoder1e4        21.99        22.09    1.00x
BenchmarkDecoder1e5        22.77        22.71    1.00x
BenchmarkDecoder1e6        22.90        22.90    1.00x
BenchmarkEncoder1e4        21.04        21.19    1.01x
BenchmarkEncoder1e5        22.06        22.06    1.00x
BenchmarkEncoder1e6        22.16        22.28    1.01x

R=rsc
CC=golang-dev, krasin
http://codereview.appspot.com/6207043
go: fix the import path "./..." not matching ".".

Tested manually.

Fixes issue 3554.

Before:
$ cd $GOROOT/src/pkg
$ go list io
io
$ go list io/...
io
io/ioutil
$ cd $GOROOT/src/pkg/io
$ go list .
io
$ go list ./...
io/ioutil

After:
$ cd $GOROOT/src/pkg
$ go list io
io
$ go list io/...
io
io/ioutil
$ cd $GOROOT/src/pkg/io
$ go list .
io
$ go list ./...
io
io/ioutil
$ go list ././...
io
io/ioutil
$ go list ././.././io/...
io
io/ioutil
$ go list ../image
image
$ go list ../image/...
image
image/color
image/draw
image/gif
image/jpeg
image/png
$ go list ../.../template
html/template
text/template
$ cd $GOROOT/src/pkg
$ go list ./io
io
$ go list ./io/...
io
io/ioutil
$ go list ./.../pprof
net/http/pprof
runtime/pprof
$ go list ./compress
can't load package: package compress: no Go source files in /home/nigeltao/go/src/pkg/compress
$ go list ./compress/...
compress/bzip2
compress/flate
compress/gzip
compress/lzw
compress/zlib
$ cd $GOROOT/src/pkg/code.google.com
$ go list ./p/leveldb-go/...
code.google.com/p/leveldb-go/leveldb
code.google.com/p/leveldb-go/leveldb/crc
code.google.com/p/leveldb-go/leveldb/db
code.google.com/p/leveldb-go/leveldb/memdb
code.google.com/p/leveldb-go/leveldb/memfs
code.google.com/p/leveldb-go/leveldb/record
code.google.com/p/leveldb-go/leveldb/table
code.google.com/p/leveldb-go/manualtest/filelock
$ go list ./p/.../truetype
code.google.com/p/freetype-go/example/truetype
code.google.com/p/freetype-go/freetype/truetype
$ go list ./p/.../example
warning: "./p/.../example" matched no packages
$ go list ./p/.../example/...
code.google.com/p/freetype-go/example/freetype
code.google.com/p/freetype-go/example/gamma
code.google.com/p/freetype-go/example/raster
code.google.com/p/freetype-go/example/round
code.google.com/p/freetype-go/example/truetype
code.google.com/p/x-go-binding/example/imgview
code.google.com/p/x-go-binding/example/xgb

R=rsc
CC=golang-dev
http://codereview.appspot.com/6194056
cmd/go: fix remote help reference to "go help packages"

go help remote used to reference "go help importpath", which has
changed to "go help packages".

Fixes issue 3598.

R=golang-dev, bradfitz
CC=golang-dev
http://codereview.appspot.com/6201065

Committer: Brad Fitzpatrick <bradfitz@golang.org>
exp/locale/collate: Add maketables tool and generated tables.
Also set maxContractLen automatically.
Note that the table size is much bigger than it needs to be.
Optimization is best done, though, when the language specific
tables are added.

R=r
CC=golang-dev
http://codereview.appspot.com/6167044