Historical ResultsBased on (3) saved test runs, The test labeled "non-referenced" was (on average) the faster by 0.0226 seconds, (2.808% faster)
The non-referenced test took 0.7806 seconds.
The referenced test took 0.8031 seconds.
Each test case ran 20 random code order iterations consisting of 202,694 loops for a total of 4,053,880 runs.
- Line execution difference (0.000006) milliseconds.
- Avg difference (0.000) milliseconds per 202,694 loops.
- Total difference 22.55 milliseconds for 4,053,880 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) $v + 1; unset($v);
The second test, "referenced", was:
foreach ($GLOBALS['dummy'] as $k => &$v) $v + 1; unset($v);