Re: length of module name affecting performance??

Daniel Gorín wrote:

On Dec 15, 2008, at 10:43 PM, Don Stewart wrote:

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dons:

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Running time as a function of module name length,

http://galois.com/~dons/images/results.png

10 is the magic threshold, where indirections start creeping in.

Codegen cost heuristic fail?

Given this, could you open a bug ticket for it, with all the info we have,

http://hackage.haskell.org/trac/ghc/newticket?type=bug

E.g. the graph, the code, the asm diff.

Cheers, Don

done! http://hackage.haskell.org/trac/ghc/ticket/2884

I followed up on the ticket. Basically the problem is to do with inlining of record selectors: when the module name is too long, none of the record selectors get inlined. Cheers, Simon