linux - How do I time execution duration of a program or script from the command line? -


i'm learning c , sense how faster of c code python equivalent.

i'm running ubuntu 12.04

from command line can use "time" command. give execution time of program in 3 separate mode (by default) - a. real time; b. user time; c. system time.

a. real time indicates how time took overall; b. user time indicates how time took executing @ userspace c. system time indicates how time took executing @ kernel space.

above way measure time commnad line. can measure program execution time in program - using system call gettimeofday().


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