Test: foreach vs. while (next)
Some people say that next() is faster than a foreach. Is it really? Note that this code won't work at all if the array has false values in it.
Run this test again Return to test menuResult: Discarded
The test labeled "foreach" was the faster by 0.0085 seconds, (0.867% faster)
The foreach test took 0.9702 seconds.
The while (next) test took 0.9787 seconds.
Nitty-Gritty
Each test case ran 20 random code order iterations consisting of 278,598 loops for a total of 5,571,960 runs.
- Line execution difference (0.000002) milliseconds.
- Avg difference (0.424) milliseconds per 278,598 loops.
- Total difference 8.48 milliseconds for 5,571,960 loops
The iteration variablity for Code 1 was (0.3475) milliseconds and Code 2 was (0.1871) milliseconds. The lower and the closer together there values are the more accurate the results are.
Code
The first test, "foreach", was:
foreach ($GLOBALS['dummy'] as $v) $v[0] + 1;
The second test, "while (next)", was:
reset($GLOBALS['dummy']); while (($v = next($GLOBALS['dummy'])) !== false) $v[0] + 1;