Various UString methods do not take into account the character size of their arguments. Also the constructors that convert numbers to strings create 16 bit strings.
Created attachment 116252 [details]
Comment on attachment 116252 [details]
What is the performance effect, if any?
(In reply to comment #2)
> (From update of attachment 116252 [details])
> What is the performance effect, if any?
This change appears neutral on SunSpider. Together with other changes it provides a benefit on SunSpider.
Committed r101152: <http://trac.webkit.org/changeset/101152>