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From: "Eli Zaretskii" <eliz@is.elta.co.il>
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Subject: Re: Ideas for debugging excessive garbage collection bugs?
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> From: "William K. Foster" <William.Foster@synopsys.com>
> Date: Fri, 08 Nov 2002 11:36:30 -0800
> 
>   How do I debug the source of allocations in Emacs?

You could invoke (print (garbage-collect)) frequently and find the
part of its report that grows the most.  That would tell you what
objects are being consed very frequently.  Then you could put a
breakpoint at the C function which allocates that type of Lisp
objects, and see what the backtrace shows when the breakpoint is hit.