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| author | Keith Randall <khr@golang.org> | 2020-09-18 14:19:22 -0700 |
|---|---|---|
| committer | Keith Randall <khr@golang.org> | 2020-09-18 21:47:28 +0000 |
| commit | 8925290cf701fc8f7ec95e4df3d6a8d423b26780 (patch) | |
| tree | 199698091a419a71a2133ea2832d47adc0dd70a2 /src/runtime/map.go | |
| parent | 7e54aa2c25690f5a7f5baad112d231b6ff8d4e5e (diff) | |
| download | go-8925290cf701fc8f7ec95e4df3d6a8d423b26780.tar.xz | |
reflect: use zero buffer to back the Value returned by Zero
In the common case (<1KB types), no allocation is required
by reflect.Zero.
Also use memclr instead of memmove in Set when the source
is known to be zero.
Fixes #33136
Change-Id: Ic66871930fbb53328032e587153ebd12995ccf55
Reviewed-on: https://go-review.googlesource.com/c/go/+/192331
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Martin Möhrmann <moehrmann@google.com>
Diffstat (limited to 'src/runtime/map.go')
| -rw-r--r-- | src/runtime/map.go | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/runtime/map.go b/src/runtime/map.go index 8be1d3991d..6f31f23d6f 100644 --- a/src/runtime/map.go +++ b/src/runtime/map.go @@ -1380,5 +1380,5 @@ func reflectlite_maplen(h *hmap) int { return h.count } -const maxZero = 1024 // must match value in cmd/compile/internal/gc/walk.go:zeroValSize +const maxZero = 1024 // must match value in reflect/value.go:maxZero cmd/compile/internal/gc/walk.go:zeroValSize var zeroVal [maxZero]byte |