Historical ResultsBased on (2) saved test runs, The test labeled "defined()" was (on average) the faster by 0.0168 seconds, (1.985% faster)
The defined() test took 0.83 seconds.
The isset() test took 0.8469 seconds.
Each test case ran 20 random code order iterations consisting of 205,486 loops for a total of 4,109,710 runs.
- Line execution difference (0.000004) milliseconds.
- Avg difference (0.000) milliseconds per 205,486 loops.
- Total difference 16.81 milliseconds for 4,109,710 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.
The first test, "defined()", was:
$GLOBALS['test'] = defined('CONSTANT');
The second test, "isset()", was:
$GLOBALS['test'] = isset($GLOBALS['CONSTANT']);