Test performance impact (was: The dreaded M-R)

Malcolm Wallace Malcolm.Wallace at cs.york.ac.uk
Thu Feb 2 07:13:16 EST 2006

John Hughes <rjmh at cs.chalmers.se> writes:

> Summary: 2 programs failed to compile due to type errors (anna, gg).
> One program did 19% more allocation, a few other programs increased
> allocation very slightly (<2%).
>             pic         +0.28%   +19.27%      0.02
> Thanks, that was interesting. A follow-up question: pic has a space bug. 
> How long will it take you to find and fix it?

Purely by looking at the code, without using automated help, about
20 minutes.

For reference, the overloaded local constants are:
    i,j in PushParticle.pushParticle
    i,j in ChargeDensity.accumCharge
In both cases, they need a type signature :: Indx


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