Ramel Eshed ]wrote:
> Hi Bram,
>
> I noticed that using system() function has an overhead of 0.2 seconds
> (checked on RHEL 5.5) while using job_start() is 10 times faster (from
> job_start to close_cb). Is this because of system() is using temp files
> instead of pipes? This is a noticeable delay.
>
> Thanks,
> Ramel
I'm guessing that system() is slower because it starts a shell process
and that shell process parses and runs the command. The shell may
even run some file like .profile (not sure) before running your command.
Whereas job_start() is I suppose doing a fork() + exec() (i.e. no shell
process) so it is faster.
To have more comparable speed, you'd need to measure something like:
- job_start(["/bin/sh", "-c" "date")
- system('date')
Dominique
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