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Reduce allocations when building strings.

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Builder has a new CreateByteString function that writes a
null-terimnated byte slice to the buffer. This results in zero
allocations for writing strings.
This commit is contained in:
rw
2015-04-02 18:22:13 -07:00
parent f02646e357
commit ace7fa8094
3 changed files with 27 additions and 14 deletions
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12
go/builder.go
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@@ -247,16 +247,20 @@ func (b *Builder) EndVector(vectorNumElems int) UOffsetT {
// CreateString writes a null-terminated string as a vector.
func (b *Builder) CreateString(s string) UOffsetT {
return b.CreateByteString([]byte(s))
}
// CreateByteString writes a null-terminated byteslice as a vector.
func (b *Builder) CreateByteString(s []byte) UOffsetT {
b.Prep(int(SizeUOffsetT), (len(s)+1)*SizeByte)
b.PlaceByte(0)
x := []byte(s)
l := UOffsetT(len(x))
l := UOffsetT(len(s))
b.head -= l
copy(b.Bytes[b.head:b.head+l], x)
copy(b.Bytes[b.head:b.head+l], s)
return b.EndVector(len(x))
return b.EndVector(len(s))
}
// CreateByteVector writes a ubyte vector