Bug#763695: console-setup: even worse than assumed

[Samuel Thibault <sthibault@debian.org>]

Eduard Bloch, le Tue 25 Aug 2015 22:34:17 +0200, a écrit :
> Hallo,
> * Samuel Thibault [Tue, Aug 25 2015, 09:56:39PM]:
> > Eduard Bloch, le Tue 25 Aug 2015 21:35:36 +0200, a écrit :
> > > * Samuel Thibault [Tue, Aug 25 2015, 08:54:35PM]:
> > > > Just so that people reading the log don't take it too exagerated:
> > > 
> > > > Eduard Bloch, le Tue 25 Aug 2015 20:24:22 +0200, a écrit :
> > > > > I checked again... about 20% of the time is spent in two calls of pidof
> > > > 
> > > > We're here talking about ~15ms each.
> > > 
> > > I don't. It's ~270ms each (I added another log with timestamps).
> > 
> > How long is the readlink /proc/*/exe | grep?
> 
> ~70ms (strace -f -tt -o logfile sh -c 'readlink /proc/*/exe | fgrep slash')

strace is quite expensive, better use just

time (readlink /proc/*/exe | fgrep slash)

But that's already a big improvement, I'm surprised that pidof can be so
expensive.

Samuel