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(parent: 43512e6) | patch
strings: Map: avoid allocation when string is unchanged
authorBrad Fitzpatrick <bradfitz@golang.org>
Mon, 28 Mar 2011 16:41:57 +0000 (09:41 -0700)
committerBrad Fitzpatrick <bradfitz@golang.org>
Mon, 28 Mar 2011 16:41:57 +0000 (09:41 -0700)
commita7a854b82f99c4fb08e44b3c942a3361894cf4b5
tree780ed383841d4f4cac7370eb624ca05cb0d9fe90tree
parent43512e6c7007b3cca7b693064e0f1da8e47e154fcommit | diff
strings: Map: avoid allocation when string is unchanged

This speeds up strings.ToLower, etc.

before/after:
strings_test.BenchmarkMapNoChanges 1000000 1013 ns/op
strings_test.BenchmarkMapNoChanges 5000000  442 ns/op

R=r, rog, eh, rsc
CC=golang-dev
https://golang.org/cl/4306056
src/pkg/strings/strings.go diff | blob | history
src/pkg/strings/strings_test.go diff | blob | history
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