How to profile a Haskell program

From HaskellWiki
Revision as of 11:54, 20 March 2007 by EricKow (talk | contribs)
Jump to navigation Jump to search
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.


Just jotting down my notes whilst profiling one of my helper scripts. It would be great if the community could transform this into a tutorial

The case study

I have a script that converts from an XML format to some pickled data structures via Data.Binary. The XML part is generated by HaXml's DtdToHaskell. On a 54M XML file, the thing swaps like crazy and takes several hours. I would like to improve the situation.

Setting things up

Get profiling versions of your libraries. For example, my script uses HaXmL, which uses a library called polyparse: 

cd polyparse
runhaskell Setup.hs configure --enable-library-profiling
runhaskell Setup.hs build
sudo runhaskell Setup.hs install
cd ..

cd HaXml
runhaskell Setup.hs configure --enable-library-profiling
runhaskell Setup.hs build

sudo runhaskell Setup.hs install

Retrieved from "https://wiki.haskell.org/index.php?title=How_to_profile_a_Haskell_program&oldid=12127"