This feature is missing on the WidthIterator, what makes WebKit to take the complex path every time any font-variant or font-feature is declared.
<rdar://problem/113268059>
Pull request: https://github.com/WebKit/WebKit/pull/15994
Committed 267095@main (03b288845585): <https://commits.webkit.org/267095@main> Reviewed commits have been landed. Closing PR #15994 and removing active labels.
*** Bug 229604 has been marked as a duplicate of this bug. ***