No. What kind of benchmark is appealing? Comparing it with ByteString?
I think comparing it to String would be a better choice; at the very least the Text version should be no worse than String.
OK. I wrote a parser to extract word of a pattern and parsed an ASCII file of about 6 Mbytes(concatenated *.texi files of Emacs). I measured performance with the time command. The compiler is GHC 6.12.3 with -O. String: 7.34s user 0.69s system 99% cpu 8.040 total Lazy ByteString: 9.95s user 0.60s system 99% cpu 10.549 total Lazy Text: 10.74s user 1.09s system 91% cpu 12.967 total Lazy Text is slower than String. But Lazy ByteString is also slow. Yes, this is not a good result. But there is no reason to merge the patch of Text. --Kazu Here is my code: ---- target :: Parser String target = appear samp -- to extract @samp{} of GNU's texi samp :: Parser String samp = string "@samp{" *> many1 (noneOf "}") <* char '}' appear :: Parser a -> Parser [a] appear p = (:) <$> try p <*> appear p <|> anyChar *> appear p <|> [] <$ eof ---