On Tue, Feb 5, 2013 at 4:23 PM, Ian Lynagh <ian@well-typed.com> wrote:

Hi Johan,

On Tue, Feb 05, 2013 at 03:19:59PM -0800, Johan Tibell wrote:
>
> + * The k-nucleotide benchmark wasn't included as it segfaults on my
> +   64-bit OS X 10.8.2 machine.

That sounds more serious than a performance regression!

Or is it a bug in the benchmark?

It might very well be a bug in the benchmark. It does lots of scary pointer manipulation. I haven't had time to look into it and see if it only happens on some GHC versions (which could suggest a GHC bug) or everywhere. It doesn't seem to happen on the 32-bit machine used by the shootout server at least.