Test: array_merge vs. + (string keys)
Semantically, array_merge() and + are identical when the arrays contain string keys.
Run this test again Return to test menuResult: Discarded
The test labeled "array_merge()" was the faster by 0.0002 seconds, (0.013% faster)
The array_merge() test took 1.1585 seconds.
The add operator test took 1.1586 seconds.
Nitty-Gritty
Each test case ran 20 random code order iterations consisting of 289,013 loops for a total of 5,780,260 runs.
- Line execution difference (0.000000) milliseconds.
- Avg difference (0.008) milliseconds per 289,013 loops.
- Total difference 0.15 milliseconds for 5,780,260 loops
The iteration variablity for Code 1 was (8.7308) milliseconds and Code 2 was (6.7626) milliseconds. The lower and the closer together there values are the more accurate the results are.
Code
The first test, "array_merge()", was:
$array = array_merge($GLOBALS['dummy1'], $GLOBALS['dummy2'], $GLOBALS['dummy3']);
The second test, "add operator", was:
$array = $GLOBALS['dummy1'] + $GLOBALS['dummy2'] + $GLOBALS['dummy3'];