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Re: Latency profiling?

From: Joseph Garvin
Subject: Re: Latency profiling?
Date: Sun, 18 Mar 2018 21:01:55 -0500

You could use a bash script that selects the Emacs window with wmctrl, attaches perf to the Emacs PID, then loops using xdotool to emulate keyboard presses while the window is visible and has focus for some number of iterations, then stops perf.

On Mar 18, 2018 8:25 PM, "Stefan Monnier" <address@hidden> wrote:
> What is the best way to emulate interactive user input and reliably assess
> the speed with which said input is processed?

I guess what you want is to use execute-kbd-macro in an interactive
Emacs session.  Tho, currently it seems that execute-kbd-macro will end
up short-circuiting the redisplay (normally redisplay is called when we
call keyboard.c:read_char, but while inside a keyboard-macro this
function will return the next "key" immediately without getting to the
redisplay call).

I think it would be valuable to make such an execution mode available
(you can probably mimick it tolerably well by just adding explicit
(redisplay t) calls between each command).


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