Test: set duplicates vs. !isset
This checks the cost of writing vs. the cost of checking if you're already written - for values that commonly overlap.
Run this test again Return to test menuResult: Discarded
The test labeled "set" was the faster by 0.0024 seconds, (0.330% faster)
The set test took 0.7287 seconds.
The !isset() test took 0.7311 seconds.
Nitty-Gritty
Each test case ran 20 random code order iterations consisting of 143,763 loops for a total of 2,875,260 runs.
- Line execution difference (0.000001) milliseconds.
- Avg difference (0.121) milliseconds per 143,763 loops.
- Total difference 2.41 milliseconds for 2,875,260 loops
The iteration variablity for Code 1 was (6.3894) milliseconds and Code 2 was (7.9008) milliseconds. The lower and the closer together there values are the more accurate the results are.
Code
The first test, "set", was:
$array = array(); for ($n = 0; $n < 100; $n++) { $k = floor($n / 12); $array[$k] = $n + 42; }
The second test, "!isset()", was:
$array = array(); for ($n = 0; $n < 100; $n++) { $k = floor($n / 12); if (!isset($array[$k])) $array[$k] = $n + 42; }