How to profile a Haskell program: Difference between revisions
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:''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'' | :''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</pre> |
Revision as of 11:54, 20 March 2007
- 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