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.
View test history (1) Run this test again Return to test menuResult: Discarded
The test labeled "set" was the faster by 0.027 seconds, (2.788% faster)
The set test took 0.9427 seconds.
The !isset() test took 0.9697 seconds.
Nitty-Gritty
Each test case ran 20 random code order iterations consisting of 271,607 loops for a total of 5,432,140 runs.
- Line execution difference (0.000005) milliseconds.
- Avg difference (1.352) milliseconds per 271,607 loops.
- Total difference 27.03 milliseconds for 5,432,140 loops
The iteration variablity for Code 1 was (0.5883) milliseconds and Code 2 was (1.3534) 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; }