Startup timings

[Olivier Galibert]

Just for information, on
  src/xemacs -geometry +0+0 -vanilla -q -kill

which takes 3.12s on my laptop (which is horribly long) on an
optimized, no debug, no kkcc, no mc-alloc compile, the biggest time
users are:

79% init-x-win
 7% startup-load-autoloads
 6% init-mule-at-startup

C startup (including pdump_load) is negligible btw.
init-mule-at-startup is actually way slower (similar time to
init-x-win) with cold disk cache too.

I'm going to try to find why init-x-win is so slow.

  OG.