Re: [Francesco Potorti` <address@hidden>] Slowness

[Eli Zaretskii]

Francesco, do you have garbage-collection-messages set to a non-nil 
value?  If not, could you please do that and see if the delays don't 
happen when Emacs GCs?  (Yes, I know, it doesn't sound like GC is the 
problem, but still...)

Another possibility is that jit-lock starts to fontify some fragment 
which takes a long time, and that postpones the idle loop where Emacs 
checks whether something is available in the input queue.  So the precise 
way of your jit-lock setup might reveal something interesting.

If you have some program that shows CPU usage, it might be interesting to 
look at its display while this slowness happens.