Historical ResultsBased on (3) saved test runs, The test labeled "defined()" was (on average) the faster by 0.0173 seconds, (2.925% faster)
The defined() test took 0.5736 seconds.
The isset() test took 0.5909 seconds.
Each test case ran 20 random code order iterations consisting of 138,147 loops for a total of 2,762,947 runs.
- Line execution difference (0.000006) milliseconds.
- Avg difference (0.000) milliseconds per 138,147 loops.
- Total difference 17.28 milliseconds for 2,762,947 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']);