Re: 100% CPU usage for a few minutes when visiting large Unicode file

[Richard Stallman]

    This time I've gotten what looks like useful information:  by typing
    "fin", and then hitting the return key a bunch of times, it became
    clear that Emacs was doing a lot of garbage collection -- and a number
    of the calls to mark_object took a good chunk of a second to finish
    _apiece_.  And there are lots of such calls.

It is not surprising that one call to mark_object could take a long
time.  Is this one GC which takes a very long time, or is it doing GC
over and over?

If the latter, then it is due to consing.  What is doing so much consing?

If you stop Emacs many times with C-z, you will sooner or later
see it in the place that does the consing.