performance testing

[David Eichmann]

Richard

The performance tests seem to be causing more confusion than I'd of 
liked. A baseline is established from previous performance test runs. 
There is a wiki page that may help: 
https://gitlab.haskell.org/ghc/ghc/wikis/building/running-tests/performance-tests. 
Let me know if that's not sufficiently helpful.

David E

On 3/10/20 11:05 PM, Richard Eisenberg wrote:
> Hi all,
>
> I'm very confused by how to do performance testing.
>
> I have a patch that seems to cause a performance regression. So I built the patch locally (`validate` flavor, with `make`) and then reproduced the regression. Good. Then, I make a small change, rebuild, commit, and then test. But now it seems that the baseline has changed. (This took some time to discover after seemingly non-deterministic results!)
>
> So: how can I make several different commits, with different experiments, switch between them at will, all without changing my baseline? I do *not* have the magic "metric decrease" bit in my commit message. Or, at least, I didn't put it there.
>
> Thanks!
> Richard
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