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| author | Josh Bleecher Snyder <josharian@gmail.com> | 2016-04-10 10:43:04 -0700 |
|---|---|---|
| committer | Josh Bleecher Snyder <josharian@gmail.com> | 2016-04-10 20:01:47 +0000 |
| commit | 974c201f74f730737964e5239da473fc548b408e (patch) | |
| tree | 69b9d31448658921477bc4e6cba414c470a563ab /src | |
| parent | a44c4256ae958b0aacecd5fd0b0e7f1156f8bcf4 (diff) | |
| download | go-974c201f74f730737964e5239da473fc548b408e.tar.xz | |
runtime: avoid unnecessary map iteration write barrier
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>
Diffstat (limited to 'src')
| -rw-r--r-- | src/runtime/hashmap.go | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/runtime/hashmap.go b/src/runtime/hashmap.go index 9e18192cd8..d549ce4194 100644 --- a/src/runtime/hashmap.go +++ b/src/runtime/hashmap.go @@ -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 |