CODEWITHSUNDEEP
linuxperformancetimeterminal
Syntactic Fructose
Syntactic Fructose

Reputation: 20076

How do I view the execution time of my program?

I want to find just how long my program takes to run from start to finish in order to compare it with a past version.

How would I go about finding the time it takes for both of these versions? I'm running ubuntu 12.04LTS

Upvotes: 0

Views: 165

Answers (3)

hek2mgl
hek2mgl

Reputation: 157967

Use the time command:

time yourprogram

By default it will output something similar to this:

real    0m0.020s
user    0m0.004s
sys     0m0.000s

real means the total time your program runs. user means the time your program spent in user land code and sys is the time your program spent in kernel calls.

Upvotes: 3

brak2718
brak2718

Reputation: 84

Linux comes with the 'time' program.

$time ./myapp

real 0m0.002s
user 0m0.000s
sys 0m0.000s

Upvotes: 1

Grzegorz
Grzegorz

Reputation: 3335

Run time myprogram The time command will display all the details you need to know. Example:

rh63-build(greg)~>time ls >/dev/null

real    0m0.003s
user    0m0.001s
sys     0m0.002s

Here is more about the time command: http://linux.die.net/man/1/time

Upvotes: 1

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