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cmd/internal/ld: change Cpos to not flush the output buffer

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DWARF generation appears to assume Cpos is cheap and this makes linking godoc
about 8% faster and linking the standard library into a single shared library
about 22% faster on my machine.

Updates #10571

Change-Id: I3f81efd0174e356716e7971c4f59810b72378177
Reviewed-on: https://go-review.googlesource.com/9913
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Michael Hudson-Doyle 2015-05-11 11:24:10 +12:00 committed by Ian Lance Taylor
parent 516f0d1c90
commit 3475ec7f36
1 changed files with 1 additions and 2 deletions
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3
src/cmd/internal/ld/lib.go
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@ -1573,12 +1573,11 @@ func Cflush() {
}
func Cpos() int64 {
Cflush()
off, err := coutbuf.f.Seek(0, 1)
if err != nil {
Exitf("seeking in output [0, 1]: %v", err)
}
return off
return off + int64(coutbuf.Buffered())
}
func Cseek(p int64) {