[Haskell-cafe] [RFC] Preliminary benchmark graphs

Don Stewart dons at galois.com
Thu Dec 20 13:58:23 EST 2007

> I added Don's three benchmarks and redid all my benchmarks with:
>   ghc 6.6.1
>   ghc 6.8.2
>   ghc 6.8.2 + bytestring
>   ghc 6.9.20071119
>   ghc 6.9.20071119 + bytestring
>   ghc head-as-of-yesterday-around-noon
>   ghc head-as-of-yesterday-around-noon + bytestring

> One thing that shows up very clearly in the graphs is that the memory
> situation is bad and that Don's recent fix only really solves the
> problem on 6.8.2, not on head.

Can you pinpoint specific programs, with either ghc 6.8.2 or
head, that allocate too much? That's likely to be a library 
issue that I can address in ByteString.

I'd need the source program, whether it is with ghc 6.8.2 or ghc head,
and what compiler flags (and input size).

Low level loop/performance issues go to SimonM (i.e. if its allocating
fine, the core is perfect, but just too slow).

-- Don

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