[Haskell-cafe] [ANN] profiteur: a tool to visualise GHC .prof files

sykora sykora at lucentbeing.com
Tue Feb 25 19:14:40 UTC 2014

I can confirm this "twitching" behavior. I ran profiteur on a ~4.1M
profile, and the tree browser works fine, except for the constant

Great work, I've been looking for this kind of tool for a while.

On Tue, Feb 25, 2014 at 2:08 PM, Mateusz Kowalczyk
<fuuzetsu at fuuzetsu.co.uk> wrote:
> On 25/02/14 19:01, Jasper Van der Jeugt wrote:
>> I uploaded a new version ( which works with the `yi.prof` file
>> you provided.
>> Hope this helps,
>> Peace,
>> Jasper
>>> Hi,
>>> Great! The way profiling output analysis is now is a huge pain in the
>>> ass. I'm very glad to see that something new is up.
>>> I did want to try it but I can't get it to run: on ghc-20140225, aeson
>>> fails to compile so that doesn't work. I did manage to compile it with
>>> 7.6.3 but after trying to run it on a profiling output I had lying
>>> around, it failed with:
>>> /home/shana/programming/yi/yi/yi.prof: Failed reading: takeWith
>>> You can find the file in question at [1] (~1.4MB). I'm most eager to try
>>> this out so it'd be great if you could have a look.
>>> Are there plans to support on-line rendering? I find it very useful to
>>> be able to see the profiling output as the program is running.
>>> Previously I ended up having to periodically (~5 sec) generate the
>>> postscript file and then have the postscript viewer watch it for
>>> changes. It was very cumbersome but it sometimes worked. It'd be great
>>> if your software could do something like this!
>>> Are flags other than -p supported? I know that it's possible to get
>>> different profiling output, such as on size of allocated structures &c.
>>> [1]: http://fuuzetsu.co.uk/misc/yi.prof
>>> --
>>> Mateusz K.
> That indeed lets me load up the file. Now I notice a problem with the
> rendering itself. When I open the generated file, the rendering on of
> the whole thing keeps twitching: what's happening is that your model
> realises there's some space still left so it tries to resize to maximum
> space available _but_ it resizes too much and scrollbars appear (making
> the whole thing 'jump' slightly). It then notices that it in fact
> doesn't fit inside the window and goes a bit smaller. Scrollbars
> disappear (so it jumps again) but then it notices that there's some
> space left and so on and so on... It's the same behaviour in Firefox and
> Chromium and resizing my browser window doesn't seem to affect it, it
> keeps toggling between slightly-too-small and slightly-too-big.
> --
> Mateusz K.
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