Historical ResultsBased on (7) saved test runs, The test labeled "referenced" was (on average) the faster by 0.0013 seconds, (0.147% faster)
The referenced test took 0.8989 seconds.
The non-referenced test took 0.9002 seconds.
Each test case ran 20 random code order iterations consisting of 225,620 loops for a total of 4,512,400 runs.
- Line execution difference (0.000000) milliseconds.
- Avg difference (0.000) milliseconds per 225,620 loops.
- Total difference 1.32 milliseconds for 4,512,400 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, "non-referenced", was:
foreach ($GLOBALS['dummy'] as $k => $v) $v++; unset($v);
The second test, "referenced", was:
foreach ($GLOBALS['dummy'] as $k => &$v) $v++; unset($v);