Unless I'm misunderstanding what you're asking for, you already have
one installed:
/Developer/Applications/Performance Tools/Shark.app

Eg:
http://developer.apple.com/tools/images/codeProfile.jpg

Avi

On Fri, Jul 11, 2008 at 6:16 PM, Eliot Miranda <eliot.miranda at gmail.com> wrote:
> Hi All,
>     I'm badly in need of a histogram-based profiler for the VM I'm working
> on.  This is something that produces a histogram of time taken against PC,
> insead of time taken against function.  The interpreter is a very large
> function and so function-centric tools aren't (IME) that useful.  I've
> written ones for BrouHaHa and VisualWorks and will write one again if
> pushed.  But I wonder whether anyone knows of anything off-the-shelf or
> close enough to be wroth using as a starting point.  For example, has anyone
> written a graphing tool in Squeak using Morphic that I could steal for the
> UI?  Yes I could start with gprof and/or gcov but I find graphical
> histograms much more immediate and helpful.
> TIA
> Eliot
>
>
>