Progression is a library that builds on the criterion
benchmarking library. It stores the results of running
your benchmarks and graphs the performance of different
versions of your program against each other. See the
Progression.Main module, and the original blog post at
http://chplib.wordpress.com/2010/02/04/progression-supporting-optimisation-in-haskell/
to get started, as well as the later post http://chplib.wordpress.com/2010/03/02/progression-0-3-bar-charts-and-normalisation/.