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Diffstat (limited to 'doc/devel/weekly.html')
| -rw-r--r-- | doc/devel/weekly.html | 167 |
1 files changed, 166 insertions, 1 deletions
diff --git a/doc/devel/weekly.html b/doc/devel/weekly.html index bf16c8370..3ee0247b1 100644 --- a/doc/devel/weekly.html +++ b/doc/devel/weekly.html @@ -14,6 +14,171 @@ hg pull hg update weekly.<i>YYYY-MM-DD</i> </pre> +<h2 id="2011-07-29">2011-07-29</h2> + +<pre> +This weekly contains performance improvements and many bug fixes. + +* 6l: OpenBSD support. +* archive/zip: handle zip files with more than 65535 files, + more efficient reader and bug fix. +* big: refine printf formatting and optimize string conversion. +* build: fixes for mingw-w64 (thanks Wei Guangjing), + miscellaneous fixes. +* cgo: add GoBytes, fix gmp example. +* exp/norm: API for normalization library. +* exp/regexp: implement regexp API using exp/regexp/syntax. +* exp/template: more tweaks and fixes, convert the tree to use exp/template. +* fmt: handle precision 0 format strings in standard way. +* gc: a raft of bug fixes. +* go/parser: report illegal label declarations at ':'. +* gob: send empty but non-nil maps. +* godoc: allow form feed in text files, + app engine configuration and updated documentation. +* goinstall: abort and warn when using any url scheme, not just 'http://', + write to goinstall.log in respective GOPATH. +* html: handle character entities without semicolons (thanks Andrew Balholm), + parse misnested formatting tags according to the HTML5 spec, + sync html/testdata/webkit with upstream WebKit. +* http: content-type sniffing, + make serveFile redirects relative (thanks Andrew Balholm), + other fixes. +* image/tiff: Do not panic when RowsPerStrip is missing (thanks Benny Siegert). +* io/ioutil: improve performance of ioutil.Discard (thanks Mike Solomon). +* ld: detect all import cycles, + ldpe fixes (thanks Wei Guangjing), + remove cseekend and redo pe writing (thanks Alex Brainman), + remove overlap of ELF sections on dynamic binaries (thanks Gustavo Niemeyer). +* net/textproto: avoid 1 copy in ReadLine, ReadContinuedLine. +* net: fix memory corruption in windows *netFD.ReadFrom (thanks Alex Brainman). +* runtime: faster entersyscall/exitsyscall, + fix scheduler races (thanks Hector Chu), + higher goroutine arg limit, clearer error, + parallelism-related performance optimizations and fixes, + replace byte-at-a-time zeroing loop with memclr (thanks Quan Yong Zhai). +* sort: fix Float64Slice sort; NaN smallest value (thanks Florian Uekermann). +* src: removed some uses of container/vector (thanks John Asmuth). +* sync: improve Once fast path. +* unicode: fix case-mapping for roman numerals. +</pre> + +<h2 id="2011-07-19">2011-07-19</h2> + +<pre> +This weekly snapshot includes a language change and a change to the image +package that may require changes to client code. + +The language change is that an "else" block is now required to have braces +except if the body of the "else" is another "if". Since gofmt always puts those +braces in anyway, programs will not be affected unless they contain "else for", +"else switch", or "else select". Run gofmt to fix any such programs. + +The image package has had significant changes made to the Pix field of struct +types such as image.RGBA and image.NRGBA. The image.Image interface type has +not changed, though, and you should not need to change your code if you don't +explicitly refer to Pix fields. For example, if you decode a number of images +using the image/jpeg package, compose them using image/draw, and then encode +the result using image/png, then your code should still work as before. + +If you do explicitly refer to Pix fields, there are two changes. First, Pix[0] +now refers to the pixel at Bounds().Min instead of the pixel at (0, 0). Second, +the element type of the Pix slice is now uint8 instead of image.FooColor. For +example, for an image.RGBA, the channel values will be packed R, G, B, A, R, G, +B, A, etc. For 16-bits-per-channel color types, the pixel data will be stored +as big-endian uint8s. + +Most Pix field types have changed, and so if your code still compiles after +this change, then you probably don't need to make any further changes (unless +you use an image.Paletted's Pix field). If you do get compiler errors, code +that used to look like this: + + // Get the R, G, B, A values for the pixel at (x, y). + var m *image.RGBA = loadAnImage() + c := m.Pix[y*m.Stride + x] + r, g, b, a := c.R, c.G, c.B, c.A + +should now look like this: + + // Get the R, G, B, A values for the pixel at (x, y). + var m *image.RGBA = loadAnImage() + i := (y-m.Rect.Min.Y)*m.Stride + (x-m.Rect.Min.X)*4 + r := m.Pix[i+0] + g := m.Pix[i+1] + b := m.Pix[i+2] + a := m.Pix[i+3] + +This image package change will not be fixed by gofix: how best to translate +code into something efficient and idiomatic depends on the surrounding context, +and is not easily automatable. Examples of what to do can be found in the +changes to image/draw/draw.go in http://codereview.appspot.com/4675076/ + +Other changes: +* 6l: change default output name to 6.out.exe on windows (thanks Alex Brainman). +* archive/zip: add Writer, + add Mtime_ns function to get modified time in sensible format. +* cc, ld, gc: fixes for Plan 9 build (thanks Lucio De Re). +* cgi: close stdout reader pipe when finished. +* cgo: add missing semicolon in generated struct, + windows amd64 port (thanks Wei Guangjing). +* codereview: fix for Mercurial 1.9. +* dashboard: list "most installed this week" with rolling count. +* debug/elf: read ELF Program headers (thanks Matthew Horsnell). +* debug/pe: fixes ImportedSymbols for Win64 (thanks Wei Guangjing). +* debug/proc: remove unused package. +* doc/talks/io2010: update with gofix and handle the errors. +* exp/eval, exp/ogle: remove packages eval and ogle. +* exp/regexp/syntax: add Prog.NumCap. +* exp/template: API changes, bug fixes, and tweaks. +* flag: make -help nicer. +* fmt: Scan(&int) was mishandling a lone digit. +* gc: fix closure bug, + fix to build with clang (thanks Dave Cheney), + make size of struct{} and [0]byte 0 bytes (thanks Robert Hencke), + some enhancements to printing debug info. +* gif: fix local color map and coordinates. +* go/build: fixes for windows (thanks Alex Brainman), + include processing of .c files for cgo packages (thanks Alex Brainman), + less aggressive failure when GOROOT not found. +* go/printer: changed max. number of newlines from 3 to 2. +* gob: register more slice types (thanks Bobby Powers). +* godoc: support for file systems stored in .zip files. +* goinstall, dashboard: Google Code now supports git (thanks Tarmigan Casebolt). +* hash/crc32: add SSE4.2 support. +* html: update section references in comments to the latest HTML5 spec. +* http: drain the pipe output in TestHandlerPanic to avoid logging deadlock, + fix Content-Type of file extension (thanks Yasuhiro Matsumoto), + implement http.FileSystem for zip files, + let FileServer work when path doesn't begin with a slash, + support for periodic flushing in ReverseProxy. +* image/draw: add benchmarks. +* json: add omitempty struct tag option, + allow using '$' and '-' as the struct field's tag (thanks Mikio Hara), + encode \r and \n in strings as e.g. "\n", not "\u000A" (thanks Evan Martin), + escape < and > in any JSON string for XSS prevention. +* ld: allow seek within write buffer< + add a PT_LOAD PHDR entry for the PHDR (thanks David Anderson). +* net: windows/amd64 port (thanks Wei Guangjing). +* os: plan9: add Process.Signal as a way to send notes (thanks Yuval Pavel Zholkover). +* os: don't permit Process.Signal after a successful Wait. +* path/filepath: fixes for windows paths (thanks Alex Brainman). +* reflect: add Value.NumMethod, + panic if Method index is out of range for a type. +* runtime: faster entersyscall, exitsyscall, + fix panic for make(chan [0]byte), + fix subtle select bug (thanks Hector Chu), + make goc2c build on Plan 9 (thanks Lucio De Re), + make TestSideEffectOrder work twice, + several parallelism-related optimizations and fixes, + stdcall_raw stack 16byte align for Win64 (thanks Wei Guangjing), + string-related optimizations (thanks Quan Yong Zhai), + track running goroutine count. +* strconv: handle [-+]Infinity in atof. +* sync: add fast paths to WaitGroup, + improve RWMutex performance. +* syscall: add Flock on Linux, + parse and encode SCM_RIGHTS and SCM_CREDENTIALS (thanks Albert Strasheim). +</pre> + <h2 id="2011-07-07">2011-07-07</h2> <pre> @@ -190,7 +355,7 @@ require changes to client code. The sort.IntArray type has been renamed to IntSlice, and similarly for StringArray and Float64Array. -The image/draw package’s Draw function now takes an additional argument, +The image/draw package's Draw function now takes an additional argument, a compositing operator. If in doubt, use draw.Over. Other changes: |