status-im
/
nim-stew
mirror of https://github.com/status-im/nim-stew.git
2
0
Fork 0
Code Issues Projects Releases Wiki Activity

avoid zeroMem when resizing trivial seq:s 

might as well grab a new sequence instead
This commit is contained in:
Jacek Sieka 2022-04-14 21:57:11 +02:00
parent 266e9002f3
commit 063e0c98b8
No known key found for this signature in database
GPG Key ID: A1B09461ABB656B8
1 changed files with 8 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
stew/assign2.nim
View File

@ -32,7 +32,14 @@ func assign*[T](tgt: var openArray[T], src: openArray[T]) =
func assign*[T](tgt: var seq[T], src: openArray[T]) = func assign*[T](tgt: var seq[T], src: openArray[T]) =
mixin assign mixin assign
tgt.setLen(src.len) when T is SomeNumber:
# `setLen` does costly zero:ing both when growing _and_ shrinking
if tgt.len > src.len or tgt.len < src.len div 4:
tgt = newSeqUninitialized[T](src.len)
else:
tgt.setLen(src.len)
else:
tgt.setLen(src.len)
assignImpl(tgt.toOpenArray(0, tgt.high), src) assignImpl(tgt.toOpenArray(0, tgt.high), src)
func assign*(tgt: var string, src: string) = func assign*(tgt: var string, src: string) =