Use equalLettersIgnoringASCIICase() and SortedArrayMap in more places, for performance.
Pull request: https://github.com/WebKit/WebKit/pull/375
Committed r293309 (249932@main): <https://commits.webkit.org/249932@main> Reviewed commits have been landed. Closing PR #375 and removing active labels.
<rdar://problem/92247702>
A stray thought: Maybe some day we can make equalIgnoringASCIICase a smart function template that automatically calls the "letters" version based on the characters in the constant string passed to it, analyzed at compile time. It would be nice to *not* have each programmer get this right, and automatically get the more efficient idiom.