Looking for GHC compile-time performance tests

Simon Peyton Jones simonpj at microsoft.com
Thu May 5 21:08:25 UTC 2016


Thanks.  A repeatable test case would be incredibly helpful here.

Simon

| -----Original Message-----
| From: Glasgow-haskell-users [mailto:glasgow-haskell-users-
| bounces at haskell.org] On Behalf Of Edward Kmett
| Sent: 05 May 2016 21:50
| To: Erik de Castro Lopo <mle+hs at mega-nerd.com>
| Cc: glasgow-haskell-users at haskell.org
| Subject: Re: Looking for GHC compile-time performance tests
| 
| vector-algorithms has gotten slower to both compile and for users rather
| consistently during each release throughout the 7.x lifecycle. That may serve
| as a good torture test as well.
| 
| > On May 6, 2016, at 6:22 AM, Erik de Castro Lopo <mle+hs at mega-nerd.com>
| wrote:
| >
| > Ben Gamari wrote:
| >
| >> So, if you would like to see your program's compilation time improve
| >> in GHC 8.2, put some time into reducing it to something minimal, submit
| >> it to us via a Trac ticket, and let us know in this thread.
| >
| > The vector package is probably a good candidate. Compling vector slowed
| > down signicantly between 7.8 and 7.10, only to speed up again with 8.0.
| >
| > Erik
| > --
| > ----------------------------------------------------------------------
| > Erik de Castro Lopo
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