[Haskell-cafe] ANN: progression-0.1

Neil Brown nccb2 at kent.ac.uk
Thu Feb 4 13:40:21 EST 2010

Hi all,

I've just uploaded the first release of Progression to Hackage.  
Progression is a small library that pulls together several other 
libraries and utilities (particularly Criterion) to support the 
optimisation of Haskell programs.

To use it, you wrap up your benchmarks in a program that passes them to 
Progression.  When you run this program, Progression records the 
benchmarks, and offers to draw you a graph comparing these latest times 
to a selection (specified by you) of previously recorded times.  What 
you get is a graph that allows you to see if your changes have made 
enough difference over your benchmarks for you to keep the change (or 
whether it has made most of them worse, and you need to roll back!).  
Progression doesn't include any benchmarking logic; it delegates all 
that to the Criterion library, and plots the resulting mean (with 
confidence intervals).

More details and an example graph are available in a blog post: 

Feedback is welcome, either here or in the comments on the blog post.



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