Averaged times (in microseconds) for drawing an 800x600 rectangle
are listed below. The summary is: around a 100x improvement.
draw.Draw call times were typically linear in the number of pixels
touched (i.e. drawing an 800x600 rectangle took 100x as much time as
drawing an 80x60 rectangle).
Before this change, there was only the general-but-slow code path.
When drawing any src with a 50%-opaque mask: 237300 us
When drawing any src with a nil mask: 50100 us
After this change, the 50%-opaque mask case is unchanged.
For an *image.RGBA dst and nil mask and...
...a uniform color (i.e. an image.ColorImage) src: 282 us
...another *image.RGBA src: 615 us.
For the curious, an intermediate implementation detected the special
cases but used simple nested for loops instead of the built-in copy
function. The respective times (compared to 282 and 615 for the
final implementation, or 50100 for the original) were 3110 and 3573.
Times were measured with 8g/8l on my laptop. I haven't tried gccgo
or other architectures.
R=r, rsc
CC=golang-dev
https://golang.org/cl/201048
Go source outside $GOROOT.
If the argument is a path starting with / or ., disregard $GOROOT.
Also, disable the check for package name matching the directory,
which is counterproductive in this case.
Apologies for the violence to the code but we need some help documenting
Go code outside the standard repository.
R=gri
CC=golang-dev
https://golang.org/cl/201064
Marshalling:
* Fixes several silly bugs.
* Support the RawContents type.
* Support the RawValue type.
* Recurse into nested interface{}.
Both directions:
* Better handling of SETs. You can now tag an element in a
structure with "set" to get the correct tag for serialisation.
* For types that aren't in a structure, you can now name them
with "SET" on the end.
* SETs are no longer implicitly treated as SEQUENCEs.
R=rsc
CC=golang-dev
https://golang.org/cl/201049
Make sure to print a time zone when formatting even if none is defined.
Add a comment introducing lookupTimezone (not lookupTimeZone).
Fixes isse 577.
R=rsc
CC=golang-dev
https://golang.org/cl/196090
Added special cases to comments for asin.go and fabs.go.
Added Trunc() to floor.go and floor_386.s. Fixed formatting
error in hypot_386.s Added new functions Acosh, Asinh,
Atanh, Copysign, Erf, Erfc, Expm1, and Log1p. Added
386 FPU version of Fmod. Added tests, benchmarks, and
precision to expected results in all_test.go. Edited
makefile so it all compiles.
R=rsc
CC=golang-dev
https://golang.org/cl/195052
* renamed channels to say what gets sent
* use channel closed status instead of racy check of boolean
R=nigeltao_golang
CC=golang-dev
https://golang.org/cl/196065
