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strings: make use of sizeclasses in (*Builder).Grow

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Fixes #64833

Change-Id: Ice3f5dfab65f5525bc7a6f57ddeaabda8d64dfa3
GitHub-Last-Rev: 38f1d6c19d
GitHub-Pull-Request: golang/go#64835
Reviewed-on: https://go-review.googlesource.com/c/go/+/552135
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This commit is contained in:
Mateusz Poliwczak 2024-02-02 15:54:24 +00:00 • committed by Keith Randall
parent cf52e70997
commit 968b71bce4
5 changed files with 26 additions and 7 deletions
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3
src/runtime/slice.go
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@ -366,5 +366,6 @@ func bytealg_MakeNoZero(len int) []byte {
if uintptr(len) > maxAlloc {
panicmakeslicelen()
}
return unsafe.Slice((*byte)(mallocgc(uintptr(len), nil, false)), len)
cap := roundupsize(uintptr(len), true)
return unsafe.Slice((*byte)(mallocgc(uintptr(cap), nil, false)), cap)[:len]
}