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Futher improve seq assingment speed by 2x factor (#6437)

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This commit is contained in:
Eduardo Bart
2017-10-09 17:55:12 -03:00
committed by Andreas Rumpf
parent d8746398c4
commit edefe4db21
1 changed files with 6 additions and 2 deletions
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8
lib/system/assign.nim
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@@ -61,13 +61,17 @@ proc genericAssignAux(dest, src: pointer, mt: PNimType, shallow: bool) =
unsureAsgnRef(x, s2)
return
sysAssert(dest != nil, "genericAssignAux 3")
unsureAsgnRef(x, newSeq(mt, seq.len))
var dst = cast[ByteAddress](cast[PPointer](dest)[])
if ntfNoRefs in mt.base.flags:
var ss = nimNewSeqOfCap(mt, seq.len)
cast[PGenericSeq](ss).len = seq.len
unsureAsgnRef(x, ss)
var dst = cast[ByteAddress](cast[PPointer](dest)[])
copyMem(cast[pointer](dst +% GenericSeqSize),
cast[pointer](cast[ByteAddress](s2) +% GenericSeqSize),
seq.len * mt.base.size)
else:
unsureAsgnRef(x, newSeq(mt, seq.len))
var dst = cast[ByteAddress](cast[PPointer](dest)[])
for i in 0..seq.len-1:
genericAssignAux(
cast[pointer](dst +% i*% mt.base.size +% GenericSeqSize),