Building GHC for performance testing

[Simon Marlow]

On 08/03/14 07:54, Herbert Valerio Riedel wrote:
> Hi Simon,
>
> On 2014-03-08 at 08:18:20 +0100, Simon Marlow wrote:
>> On 06/03/14 09:50, Johan Tibell wrote:
>
> [...]
>
>>>    * Are there any tweaks to mk/build.mk <http://build.mk> we can do to
>>> make the build faster without compromising the results?
>>
>> Turn down the stage2 optimisation, and turn off the docs:
>>
>> GhcStage2HcOpts = -O
>
> ...but doesn't that compromise the compile-time metrics collected by
> nofib about GHC's performance?

I think Johan is interested primarily in runtime performance, but yes if 
you care about compile time then it's better to leave GhcStage2HcOpts at 
the default.

Cheers,
Simon