7e26a2d9a8
Preallocating them in reflect means that (1) if you say _ = PtrTo(ArrayOf(1000000000, reflect.TypeOf(byte(0)))), you just allocated 1GB of data (2) if you say it again, that's *another* GB of data. The only use of t.zero in the runtime is for map elements. Delay the allocation until the creation of a map with that element type, and share the zeros. The one downside of the shared zero is that it's not garbage collected, but it's also never written, so the OS should be able to handle it fairly efficiently. Change-Id: I56b098a091abf3ac0945de28ebef9a6c08e76614 Reviewed-on: https://go-review.googlesource.com/10111 Reviewed-by: Keith Randall <khr@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:
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