Increased memory usage with GHC 7.10.1

[David Laing]

Hi all,

I've been playing around with profiling GHC recently, so I thought I'd
chime in with a pointer that might save people searching for the right docs
- you could configure a cabal sandbox to work with multiple version of ghc,
which I've found useful:

https://www.haskell.org/cabal/users-guide/installing-packages.html#sandboxes-advanced-usage

Cheers,

Dave

On Fri, Apr 17, 2015 at 6:01 AM, Michal Terepeta <michal.terepeta at gmail.com>
wrote:

> Hi Richard,
>
> Thanks updating the ticket! What I did was: build GHC HEAD/7.8.4 with
> build flavor 'prof' then get the haskell-src-exts sources, install the
> dependencies and finally add +RTS -p -RTS to the cabal file and compile it,
> the resulting ghc.prof contains the profiling information.
>
> For anyone interested about CallArity slowness, the problem is tracked in
> https://ghc.haskell.org/trac/ghc/ticket/10293
>
> Cheers,
> Michal
>
> On Wed, Apr 15, 2015 at 1:40 AM Richard Eisenberg <eir at cis.upenn.edu>
> wrote:
>
>> I've pasted Michal's numbers in #9630, which seems like a good place to
>> track this. Michal, would you mind fleshing out a bit precisely what you
>> did to get those numbers? That would be helpful (though you've already been
>> very helpful indeed in getting the data together)!
>>
>> Thanks,
>> Richard
>>
>> On Apr 14, 2015, at 9:09 PM, Joachim Breitner <mail at joachim-breitner.de>
>> wrote:
>>
>> > Hi,
>> >
>> > Am Dienstag, den 14.04.2015, 21:54 +0200 schrieb Michal Terepeta:
>> >> On Mon, Apr 13, 2015 at 10:34 PM, Christiaan Baaij
>> >> <christiaan.baaij at gmail.com> wrote:
>> >>> Actually, I meant only with -fno-specialise.
>> >>
>> >> Done. Helps quite a bit but CallArity is still a pretty expensive.
>> >
>> > I’m on that, and I think I have a quite neat fix for it. I’ll report on
>> > that in the trac ticket:
>> > https://ghc.haskell.org/trac/ghc/ticket/10293#comment:4
>> >
>> > Greetings,
>> > Joachim
>> >
>> > --
>> > Joachim “nomeata” Breitner
>> >  mail at joachim-breitner.de • http://www.joachim-breitner.de/
>> >  Jabber: nomeata at joachim-breitner.de  • GPG-Key: 0xF0FBF51F
>> >  Debian Developer: nomeata at debian.org
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