Bash Measure Script Execution Time
Measuring Script Execution Times in Bash
If you want to time how long it takes to run a given script in the command line, use the time command.
time sleep 4
real 0m4.005s user 0m0.001s sys 0m0.002s
Place piped or chained command strings in backticks.
time `sleep 3 && sleep 3`
real 0m6.010s user 0m0.001s sys 0m0.005s
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