It depends on what you compare to. Bryan aimed for speed got to 56% of the speed of the C parser he used as a benchmark, using 54 lines of code. The C parser is

It depends on what you compare to. Bryan aimed for speed got to 56% of the speed of the C parser he used as a benchmark, using 54 lines of code. The C parser is a 1,672 lines hand-rolled parser that's only does HTTP, while attoparsec is a general purpose library. Bryan wrote about it here: http://www.serpentine.com/blog/2010/03/03/whats-in-a-parser-attoparsec-rewired-2/ http://www.serpentine.com/blog/2010/03/03/whats-in-a-parser-...