Does anyone know a way to sleep less than 1 second?
Sometimes when I write scripts that iterates a loop many times it would be
nice to slow things down, but sometimes 1 second is too much.

If your system has "usleep" this allows you to sleep in increments of milliseconds instead of seconds.

usleep in C code.

I dont have usleep in my system, which is AIX 5.2.
Is there a compiled version of usleep to download. I think I'm not able
to compile it myself.

If you have perl try:

perl -e 'select(undef,undef,undef,.1)'

That .1 means .1 seconds.

That works. It is hard to meassure the time but it is definitely less than 1 second.

Thanks a lot.

IT's not hard to measure the elapsed time:
Put Perderabo's code in a script, call it usleep.sh

time usleep.sh

kcsdev:/home/jmcnama> time usleep.sh

real    0m0.18s
user    0m0.03s
sys     0m0.05s