Re: Tip: how to speed up XEmacs start
On Thu, Dec 18, 1997 at 10:00:58PM +0200, Heikki Vatiainen wrote:
> If you are in a hurry do
> touch /tmp/.sockets/audio0
> otherwise read on :)
> I was qurious about what makes XEmacs so slow at startup. With the help of
> the strace(1) utility I found the following interesting behaviour of
> XEmacs19. The XEmacs I am using is version 19.16-1 which comes with the
> unstable distribution.
> When XEmacs starts up it creates a UNIX domain socket and tries to connect it
> to /tmp/.sockets/audio0. If this special file does not exist (ENOENT is
> returned) it does nanosleep(2) five times and sleeps about 1 second each
> time. Only after nanosleeping it will continue loading.
> If a plain file named /tmp/.sockets/audio0 is created XEmacs gets
> ECONNREFUSED as return value and goes on without nanosleeping or retrying.
> This speeds up the startup time for about five seconds on my machine.
> /usr/bin/time reports the time going from about 8.7 to 3.7 seconds.
> I hope you find this tip useful,
Wow! I must have a slower machine, but it reduced the time from 20 to 15
seconds. I ran xemacs four times with the file (28s,18s,15s,15s), then removed
the file (20s,20s).
This is probably worth forwarding upstream so that Xemacs (or the particular
.el) can include this speedup.
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