On Sat, Aug 14, 2010 at 6:05 PM, Bryan O'Sullivan <bos@serpentine.com> wrote:

If it's not good enough, and the fault lies in a library you chose, report a bug and provide a test case.

As a case in point, I took the string search benchmark that Daniel shared on Friday, and boiled it down to a simple test case: how long does it take to read a 31MB file?

GNU wc -m:

en_US.UTF-8: 0.701s

text 0.7.1.0:

lazy text: 1.959s
strict text: 3.527s

darcs HEAD:

lazy text: 0.749s
strict text: 0.927s