bug#51734: 29.0.50; got slow

[Eli Zaretskii]

> Date: Fri, 12 Nov 2021 13:22:28 -0500
> Cc: yamaoka@jpl.org, 51734@debbugs.gnu.org
> From: Ken Brown <kbrown@cornell.edu>
> 
> The only thing I can think of is that Cygwin is probably the only system that 
> has timerfd and that also has to use timers to poll for input.  (The others 
> all 
> use SIGIO, if I'm not mistaken.)  By using two different kinds of timers 
> simultaneously, we're getting timers expiring twice as often and not at 
> regular 
> intervals.  Could this account for the slowdown?

At what frequency does the other timer tick, the one used to poll for
input?

> In any case, I think I should go ahead and install the patch to make the 
> master 
> branch usable again on Cygwin.

Feel free.