I'm trying to measure the execution time of a process that I call via the command line (i.e., I want to find out how long it takes to for the process to finish). Is there any command that I can add to the command calling the process that will achieve this?
time before the command you want to measure. For example:
The output will look like:
real 0m0.606s user 0m0.000s sys 0m0.002s
real: Elapsed real (wall clock) time used by the process, in seconds.
user: Total number of CPU-seconds that the process used directly (in user mode), in seconds.
sys: Total number of CPU-seconds used by the system on behalf of the process (in kernel mode), in seconds.
For a line-by-line delta measurement, try gnomon.
It is a command line utility, a bit like moreutils's ts, to prepend timestamp information to the standard output of another command. Useful for long-running processes where you'd like a historical record of what's taking so long.
Piping anything to gnomon will prepend a timestamp to each line, indicating how long that line was the last line in the buffer--that is, how long it took the next line to appear. By default, gnomon will display the seconds elapsed between each line, but that is configurable.
You can use
time ls -R
date +"%T" && cp -r ./file /destination/folder/here && date +"%T"
Running this command in the terminal will give you the total time for coping a file
Occasionally I find myself needing a stopwatch to count how long it takes for an action like my app booting, in which case many of the solutions here are not useful.
For this I like to use sw.
wget -q -O - http://git.io/sinister | sh -s -- -u https://raw.githubusercontent.com/coryfklein/sw/master/sw
sw - start a stopwatch from 0, save start time in ~/.sw sw [-r|--resume] - start a stopwatch from the last saved start time (or current time if no last saved start time exists) - "-r" stands for --resume
time -v command
-v gives more information