Re: Default of jit-lock-stealth-time

[Richard Stallman]

    Regardless of the system load: the load may be low at the moment
    _exactly_ because the user terminated all processes that would disturb
    the interactivity of his current work, and I think it a mistake that
    Emacs considers the CPU fit for grabbing for its own purposes unless
    the user _explicitly_ asked for it.

Stealth fontification is intended to stop whenever the user types a
character.  So why would it interfere with the "interactivity" of
Emacs commands?  Is there a bug which prevents stealth fontification
from stopping quickly?