how to time a process in bash?

Easiest way is to use bash's integrated time, GNU Time or another unix time command implementation:

time ./sript.sh

If you're interested in ticks, you can approximate it with a little help from /proc/cpuinfo.

If you want to dig deeper, have a look at strace.

mbx

Posted 2011-04-04T00:01:06.647

Reputation: 724

What if one wants to measure the time between multiple commands/lines? – normanius – 2019-07-10T21:52:48.793

2time is a shell keyword – Hello71 – 2011-04-25T23:21:18.083

1@Hello71 my linux bash does not provide a time command, it uses /usr/bin/time. However zsh does, as well as my solaris tcsh. So even if it's not builtin your shell, you have a time provided by your userland as a fallback. Besides, those time commands may provide a slightly different output. – mbx – 2011-04-26T09:45:54.877

@mbx: As of version 2.0 of Bash, time became a shell reserved word, with slightly altered behavior in a pipeline.

– Hello71 – 2011-04-26T20:04:29.843

@Hello71 although reserved, on that ystem which time returns userland time instead of the reserved keyword warning – mbx – 2011-04-26T21:20:53.990

@mbx: which never does that. I'm referring to type. – Hello71 – 2011-04-26T21:21:50.340

@Hello71 not which, but the shell does (zsh and tcsh) – mbx – 2011-04-26T21:37:09.037

how to time a process in bash?

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