Optimize SVGPathByteStreamBuilder::append() by appending sevearl bytes at once instead of appending bytes one by one to the Vector.
Pull request: https://github.com/WebKit/WebKit/pull/17250
Committed 267470@main (bac6d7369d4b): <https://commits.webkit.org/267470@main> Reviewed commits have been landed. Closing PR #17250 and removing active labels.
<rdar://problem/114730032>