Test: system vs. shell_exec
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The test labeled "shell_exec()" was the faster by 0.022 seconds, (3.395% faster)
The shell_exec() test took 0.6269 seconds.
The system() test took 0.6489 seconds.
Nitty-Gritty
Each test case ran 20 random code order iterations consisting of 133,746 loops for a total of 2,674,920 runs.
- Line execution difference (0.000008) milliseconds.
- Avg difference (1.101) milliseconds per 133,746 loops.
- Total difference 22.03 milliseconds for 2,674,920 loops
The iteration variablity for Code 1 was (7.1397) milliseconds and Code 2 was (5.2475) milliseconds. The lower and the closer together there values are the more accurate the results are.
Code
The first test, "system()", was:
system('ls');
The second test, "shell_exec()", was:
echo shell_exec('ls');