Better time utility

Osiris · 2014-10-18 22:44:38

Hello,

the builtin time can be used to time process execution times. Is there some enhanced version of time? I could use features like, start the process 10 times and give statistics about execution times.

Thx!

karol · 2014-10-19 01:00:09

Why not use a 'for' loop for this?
If you want mean and standard deviations statistics, you'd have to use some other tool to compute them.

jasonwryan · 2014-10-19 01:01:22

Not a GNU/Linux discussion, moving to Apps & DEs...

cargoan · 2014-10-19 06:22:16

GNU time (pacman -S time).
After install call with /usr/bin/time or create an alias in your .bashrc file (alias time="/usr/bin/time")

Osiris · 2014-10-19 08:59:43

Regarding its man page http://man7.org/linux/man-pages/man1/time.1.html it does not seem to have a lot more features than builtin time, esp. no statistics over multiple run. Or have it?

karol · 2014-10-19 12:28:11

They have different output formatting options, one may be easier parseable than the other, time(1) can show much more info, but it may be irrelevant in your situation.

karol · 2014-10-19 17:24:06

lrzip provides its own nice and verbose output, but I cobbled this:

$ for i in 1 4 6 9; do /usr/bin/time -f'%E : %C' -ao foo lrzip -fqg -L$i test.tar -o $i.lrz; done; du -sh *.lrz | sort -k 2 > bar

Summary:

$ join -o 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 2.1 -1 8 -2 2 foo bar
0:00.07 : lrzip -fqg -L1 test.tar -o 1.lrz 292K
0:00.10 : lrzip -fqg -L4 test.tar -o 4.lrz 268K
0:00.17 : lrzip -fqg -L6 test.tar -o 6.lrz 256K
0:00.57 : lrzip -fqg -L9 test.tar -o 9.lrz 252K

Short version:

$ join -o 1.1 1.5 2.1 -1 8 -2 2 foo bar
0:00.07 -L1 292K
0:00.10 -L4 268K
0:00.17 -L6 256K
0:00.57 -L9 252K

You can add headers, like 'time', 'compression level' and 'filesize' to make it prettier.

As for some statistic:

$ for i in 1 4 6 9; do /usr/bin/time -f'%e' -ao baz lrzip -fqg -L$i test.tar -o $i.lrz; done
$ cat baz
0.07
0.10
0.17
0.55

$ datastat --dev --min --max baz | tr '#' ' ' | column -t
avg     dev       min   max
0.2225  0.192532  0.07  0.55

See e.g. http://stackoverflow.com/questions/9789 … s-in-linux

Arch Linux

#1 2014-10-18 22:44:38

Better time utility

#2 2014-10-19 01:00:09

Re: Better time utility

#3 2014-10-19 01:01:22

Re: Better time utility

#4 2014-10-19 06:22:16

Re: Better time utility

#5 2014-10-19 08:59:43

Re: Better time utility

#6 2014-10-19 12:28:11

Re: Better time utility

#7 2014-10-19 17:24:06

Re: Better time utility

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