length of module name affecting performance??

Simon Marlow marlowsd at gmail.com
Tue Dec 16 04:55:04 EST 2008

Daniel Gorín wrote:
> On Dec 15, 2008, at 10:43 PM, Don Stewart wrote:
>> dons:
>>> 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.


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