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| author | Dmitriy Vyukov <dvyukov@google.com> | 2014-01-27 15:11:12 +0400 |
|---|---|---|
| committer | Dmitriy Vyukov <dvyukov@google.com> | 2014-01-27 15:11:12 +0400 |
| commit | bace9523eed9bc695310cd327b19ecdf7aa44612 (patch) | |
| tree | 4681c7cab80d9aa0b49f93db0b7aad22753d485d /src/pkg/runtime/malloc.h | |
| parent | 496c030c506bf1ac18c82ba85d4bcc5031253bdf (diff) | |
| download | go-bace9523eed9bc695310cd327b19ecdf7aa44612.tar.xz | |
runtime: smarter slice grow
When growing slice take into account size of the allocated memory block.
Also apply the same optimization to string->[]byte conversion.
Fixes #6307.
benchmark old ns/op new ns/op delta
BenchmarkAppendGrowByte 4541036 4434108 -2.35%
BenchmarkAppendGrowString 59885673 44813604 -25.17%
LGTM=khr
R=khr
CC=golang-codereviews, iant, rsc
https://golang.org/cl/53340044
Diffstat (limited to 'src/pkg/runtime/malloc.h')
| -rw-r--r-- | src/pkg/runtime/malloc.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/pkg/runtime/malloc.h b/src/pkg/runtime/malloc.h index 8122b4b0b8..4146299223 100644 --- a/src/pkg/runtime/malloc.h +++ b/src/pkg/runtime/malloc.h @@ -273,6 +273,7 @@ extern MStats mstats; // making new objects in class i int32 runtime·SizeToClass(int32); +uintptr runtime·roundupsize(uintptr); extern int32 runtime·class_to_size[NumSizeClasses]; extern int32 runtime·class_to_allocnpages[NumSizeClasses]; extern int8 runtime·size_to_class8[1024/8 + 1]; |