Re: nofib on Shake

On Sun, Jan 8, 2017 at 7:45 PM Ben Gamari wrote: Michal Terepeta writes:

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Hi all,

While looking at nofib, I've found a blog post from Neil Mitchell [1], which describes a Shake build system for nofib. The comments mentioned that this should get merged, but it seems that nothing actually happened? Is there some fundamental reason for that?

Indeed there is no fundamental reason and I think it would be great to make nofib a bit easier to run and modify.

Ok, cool. I'll have a look at using Neil's code and see if it needs any updating or if something is missing.

However, I think we should be careful to maintain some degree of compatibility. One of the nice properties of nofib is that it can be run against a wide range of compiler versions. It would be ashame if, for instance, Joachim's gipeda had to do different things to extract performance metrics from logs produced by logs pre- and post-Shake nofibs.

Thanks for mentioning this! I don't have any concrete plans to change that at the moment, but I was thinking that in the future it'd be nice if the results were, e.g., a simple csv file, instead of a log containing all the stdout/stderr (i.e., it currently contains the results, any warnings from GHC, output from `Debug.Trace.trace`, etc.) Anyway, that's probably further down the road, so before doing anything, I'll likely send an email to ghc-devs so that we can discuss this. Cheers, Michal