Finding out how long a command takes to run

cfoxwell · #1 (**permalink**) 11-05-2001

Hi I am trying to find out the best way to find out how long a command takes to run in miliseconds ..

Is there such a way of doing this in Unix ?

Thanks

Perderabo · #2 (**permalink**) 11-05-2001

There is a time command and a times sytem call that can be used to time a process. But the resolution is usually 1/100 second.

ystee · #3 (**permalink**) 11-21-2001

Quote:

Originally posted by Perderabo
There is a time command and a times sytem call that can be used to time a process. But the resolution is usually 1/100 second.

Is there a difference between unix and linux.
Actually which version of unix are we talking about? I did a man on time on Linux and the resolution is in terms of seconds rather than miliseconds.

LivinFree · #4 (**permalink**) 11-22-2001

Well, I've found that command is kind of wierd... On a Slackware Linux system (I'm using the bash shell), I ran `time ls` and got:

Code:

real     0m0.012s
user     0m0.010s
sys      0m0.000s

But there is also /usr/bin/time... (I think the previous example is a shell builtin). This is the output from `/usr/bin/time ls`:

Code:

0.00user 0.00system 0:00.00elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (102major+15minor)pagefaults 0swaps

Much different.

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