There should be no extra cost if create the string without copying and it allows us to use runtime-generated strings which will be necessary soon
<rdar://problem/104299588>
Pull request: https://github.com/WebKit/WebKit/pull/8697
Committed 259044@main (b965bbcd7618): <https://commits.webkit.org/259044@main> Reviewed commits have been landed. Closing PR #8697 and removing active labels.