Hi, I found that some performance tests cases fail in some setting, and not in another, and after a while I found the cause: The default settings (i.e. no mk/build.mk) have GhcLibHcOpts=-O2, while most development profiles (e.g. devel2) _and the validate settings_ have GhcLibHcOpts=-O1.
It doesn’t make a lot of sense to have performance tests cases without
fixing this parameter. And I think we really should be validating the
settings that we actually used in the final build that we release.
Hence three questions:
1. Are the default settings really the settings used when producing the
final build?
2. Do we want to use GhcLibHcOpts=-O2 or GhcLibHcOpts=-O for releases?
3. Once 2. is answered, may I change the validate settings to that
value, and update the performance tests to expect the number
produced with that value?
(This was first observed in
https://ghc.haskell.org/trac/ghc/ticket/9315#comment:5 but I wanted to
the wider audience of the mailing list for such a design decision.)
Thanks,
Joachim
--
Joachim Breitner
e-Mail: m...@joachim-breitner.de
Homepage: http://www.joachim-breitner.de
Jabber-ID: nome...@joachim-breitner.de
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