Profiler in Callgrind format

Hello,
I'm a co-developer of (yet another) a web framework...Being mainly a
server-side programmer, after profiling the execution using Venkman
(and now also the great firebug1.0 feature) I miss the visualization
quality of tools like KCacheGrind or WinCacheGrind that uses the
Callgrind Format. We have a lot of classes and complex (ajax) things,
and the tabular output doesn't fit very well  (this kind of framework
may be useless, but there's where we and thousands are) you can't
follow specific threads of execution, you don't know who the callers
and calles are, even the memory consumption is missed.

Seeking this goal, I've started to develop an extension using
jsdIDebuggerService, but it's not enough because for callgrind you need
a step-by-step execution (horrible for performance) and jsdlDebugger
gives you pre-processed information. What do you think? Is it possible
to write an specific XPCOM component or improve the actual one?

I'm not blaming the current work, works very well for nearly all the
projects, but I think that a more powerfull profiler is needed in the
today's javascript. Am I crazy?

Sorry for my english. I'm trying to improve it.

Regards,
Sebastián Marconi

Links:
 - Kcachegrind: http://kcachegrind.sourceforge.net/cgi-bin/show.cgi
 - WinCachegrind: http://sourceforge.net/projects/wincachegrind/
 - Callgrind format:
http://kcachegrind.sourceforge.net/cgi-bin/show.cgi/KcacheGrindCalltreeFormat