Historical ResultsBased on (1) saved test runs, The test labeled "non-referenced" was (on average) the faster by 0.0091 seconds, (1.227% faster)
The non-referenced test took 0.732 seconds.
The referenced test took 0.7411 seconds.
Each test case ran 20 random code order iterations consisting of 192,819 loops for a total of 3,856,380 runs.
- Line execution difference (0.000002) milliseconds.
- Avg difference (0.000) milliseconds per 192,819 loops.
- Total difference 9.09 milliseconds for 3,856,380 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);