bd6d84282a
Removes specialized functions for each verb and float/complex size and replaces them with generic variants fmtFloat and fmtComplex similar to other generic fmt functions. Simplifies the complex formatting by relying on fmtFloat to handle the verb and default precision selection. Complex imaginary formatting does not need to clear the f.space flag because the set f.plus flag will force a sign instead of a space. Sets default precision for %b to -1 (same as %g and %G) since precision for %b has no affect in strconv.AppendFloat. Add more tests and group them a bit better. Use local copies of +Inf,-Inf and NaN instead of math package functions for testing. Saves around 8kb in the go binary. name old time/op new time/op delta SprintfFloat-2 200ns ± 4% 196ns ± 4% -1.55% (p=0.007 n=20+20) SprintfComplex-2 569ns ± 4% 570ns ± 3% ~ (p=0.804 n=20+20) Change-Id: I36d35dab6f835fc2bd2c042ac97705868eb2446f Reviewed-on: https://go-review.googlesource.com/20252 Reviewed-by: Rob Pike <r@golang.org> Run-TryBot: Rob Pike <r@golang.org> |
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The Go Programming Language
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Binary Distribution Notes
If you have just untarred a binary Go distribution, you need to set the environment variable $GOROOT to the full path of the go directory (the one containing this file). You can omit the variable if you unpack it into /usr/local/go, or if you rebuild from sources by running all.bash (see doc/install-source.html). You should also add the Go binary directory $GOROOT/bin to your shell's path.
For example, if you extracted the tar file into $HOME/go, you might put the following in your .profile:
export GOROOT=$HOME/go
export PATH=$PATH:$GOROOT/bin
See https://golang.org/doc/install or doc/install.html for more details.