Historical ResultsBased on (3) saved test runs, The test labeled "non-referenced" was (on average) the faster by 0.024 seconds, (2.278% faster)
The non-referenced test took 1.0288 seconds.
The referenced test took 1.0528 seconds.
Each test case ran 20 random code order iterations consisting of 256,604 loops for a total of 5,132,073 runs.
- Line execution difference (0.000005) milliseconds.
- Avg difference (0.000) milliseconds per 256,604 loops.
- Total difference 23.98 milliseconds for 5,132,073 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) $GLOBALS['dummy'][$k]++; unset($v);
The second test, "referenced", was:
foreach ($GLOBALS['dummy'] as $k => &$v) $v++; unset($v);