Historical Results
Based on (4) saved test runs, The test labeled "exec()" was (on average) the faster by 0.0191 seconds, (1.888% faster)
The exec() test took 0.993 seconds.
The shell_exec() test took 1.0121 seconds.
Nitty-Gritty
Each test case ran 20 random code order iterations consisting of 263,710 loops for a total of 5,274,200 runs.
- Line execution difference (0.000004) milliseconds.
- Avg difference (0.000) milliseconds per 263,710 loops.
- Total difference 19.10 milliseconds for 5,274,200 loops
The iteration variablity for Code 1 was (0.0000) milliseconds and Code 2 was (0.0000) milliseconds. The lower and the closer together there values are the more accurate the results are.
Code
The first test, "exec()", was:
exec('ls');
The second test, "shell_exec()", was:
shell_exec('ls');