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How to profile a Haskell program

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[[Category:Tutorial]]
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[[Category:Tutorials]]
   
 
:''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''
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== The case study ==
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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.
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== Setting things up ==
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Get profiling versions of your libraries. For example, my script uses HaXmL, which uses a library called polyparse:
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cd polyparse
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runhaskell Setup.hs configure --enable-library-profiling
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runhaskell Setup.hs build
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sudo runhaskell Setup.hs install
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cd ..
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cd HaXml
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runhaskell Setup.hs configure --enable-library-profiling
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runhaskell Setup.hs build
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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

1 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.

2 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>