Historical ResultsBased on (3) saved test runs, The test labeled "defined()" was (on average) the faster by 0.0145 seconds, (2.090% faster)
The defined() test took 0.6787 seconds.
The isset() test took 0.6932 seconds.
Each test case ran 20 random code order iterations consisting of 186,801 loops for a total of 3,736,013 runs.
- Line execution difference (0.000004) milliseconds.
- Avg difference (0.000) milliseconds per 186,801 loops.
- Total difference 14.49 milliseconds for 3,736,013 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']);