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runtime: avoid unnecessary map iteration write barrier

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Update #14921

Change-Id: I5c5816d0193757bf7465b1e09c27ca06897df4bf
Reviewed-on: https://go-review.googlesource.com/21814
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Josh Bleecher Snyder 2016-04-10 10:43:04 -07:00
parent a44c4256ae
commit 974c201f74
1 changed files with 3 additions and 1 deletions
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4
src/runtime/hashmap.go
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@ -790,7 +790,9 @@ next:
}
}
it.bucket = bucket
it.bptr = b
if it.bptr != b { // avoid unnecessary write barrier; see issue 14921
it.bptr = b
}
it.i = i + 1
it.checkBucket = checkBucket
return