Measure script execution time

Yes.

 time script

Where script is the script to monitor the time for.

For instance, time find ~ will output something like this (Depending on the size of your home directory, that is):

real    0m49.139s
user    0m0.663s
sys     0m4.129s

I made a tic/toc timer pair utility called ttic and ttoc. It's available here.

Example use:

$ ttic && sleep 0.4 && ttoc
0.405

To avoid conflicts with an existing tic/toc pairing, an ID can be specified, here foo:

$ ttic foo && sleep 0.5 && ttoc foo

Or assign a random ID, like so:

$ id=$(ttic --unique) && sleep 0.5 && ttoc $id

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