Figuring out what's doing so much allocation

[Jim Blandy]

I was running into a problem (now fixed) in which gc was running
constantly, so I put together the following hack to figure out who was
doing the allocation. Set gc-quit-frequency to something like 20, and
then set debug-on-quit, and you'll get a backtrace every 20th gc. It's
hardly precise, but often one just needs a hint to suss out the cause.

gc-quit-frequency.patch
Description: Text Data