Historical ResultsBased on (1) saved test runs, The test labeled "non-referenced" was (on average) the faster by 0.0037 seconds, (0.738% faster)
The non-referenced test took 0.5021 seconds.
The referenced test took 0.5059 seconds.
Each test case ran 20 random code order iterations consisting of 141,951 loops for a total of 2,839,020 runs.
- Line execution difference (0.000001) milliseconds.
- Avg difference (0.000) milliseconds per 141,951 loops.
- Total difference 3.74 milliseconds for 2,839,020 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);