Hmm, ok, you mean in CFString.c of Darwin? Can I be sure that e.g.
the appendString method of a Cocoa NSString is directly mapping to
the equivalent CFString function (CFStringAppend in this case)?
To answer my own question (and if CFStringAppend is used):
For the special case of appending a string to itself there is special
handling at least in the sources for 10.4.10. But I also looked into
the sources for 10.3.9 and there this special handling is missing.
The special handling just creates a temporary copy of the string.
So I'd better do my own copy, to be on the safe side.
Mani
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