Unexpected lack of change in ghcspeed results

Reid Barton rwbarton at gmail.com
Wed Jan 27 22:35:18 UTC 2016


Oh! I guess the name ghcspeed was too memorable... and browser bar
autocompletion did the rest. Sorry for the noise!

Regards,
Reid Barton

On Wed, Jan 27, 2016 at 5:23 PM, Joachim Breitner <mail at joachim-breitner.de>
wrote:

> Dear Reid,
>
> Am Mittwoch, den 27.01.2016, 14:50 -0500 schrieb Reid Barton:
> > I was interested to see what effect the recent commit "Restore
> > original alignment for info tables" (0dc7b36c) would have on
> > performance. However, when I look at http://ghcspeed-nomeata.rhcloud.
> > com/changes/?rev=0dc7b36c3c261b3eccf8460581fcd3d71f6e6ff6, I don't
> > see the expected binary size increase (about 1%) that I got in local
> > testing. Instead, the size increase appears to be attached to commit
> > 0d92d9cb6d65fd00f9910c3f6f85bc6c68f5543b.
> >
> > I notice that these two commits, along with three others, were
> > committed at exactly the same time (Wed Jan 27 11:32:15 2016 +0100),
> > presumably in a rebase. Could this be confusing ghcspeed?
> >
>
> heh, I’m surprised: Both that the ghcspeed server still runs, and that
> people are still using it :-)
>
> Indeed, you observe correctly, ghcspeed does not handle git rebases
> well. That was one of the reasons why I reimplemented the server from
> scratch. It now runs under perf.haskell.org, and there the expected
> changes are attributed to the right commit:
>
> https://perf.haskell.org/ghc/#revision/0dc7b36c3c261b3eccf8460581fcd3d71f6e6ff6
>
> Is ghcspeed still linked somewhere, or was it an old bookmark from you
> that led you there?
>
> Greetings,
> Joachim
>
> --
> Joachim “nomeata” Breitner
>   mail at joachim-breitner.dehttp://www.joachim-breitner.de/
>   Jabber: nomeata at joachim-breitner.de  • GPG-Key: 0xF0FBF51F
>   Debian Developer: nomeata at debian.org
>
>
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