Test: array_keys(array_flip) vs. array_unique
Do note that this test is only using integer values (which is common for this), long strings will take longer to hash as array keys.
Run this test again Return to test menuHistorical Results
Based on (4) saved test runs, The test labeled "array_unique()" was (on average) the faster by 0.0076 seconds, (0.978% faster)
The array_unique() test took 0.7695 seconds.
The array_keys(array_flip()) test took 0.7771 seconds.
Nitty-Gritty
Each test case ran 20 random code order iterations consisting of 166,697 loops for a total of 3,333,945 runs.
- Line execution difference (0.000002) milliseconds.
- Avg difference (0.000) milliseconds per 166,697 loops.
- Total difference 7.60 milliseconds for 3,333,945 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.
Code
The first test, "array_keys(array_flip())", was:
$array = array();
for ($n = 0; $n < 8; $n++)
{
for ($i = 0; $i < 50; $i++)
$array[] = $i;
}
$array = array_keys(array_flip($array));
The second test, "array_unique()", was:
$array = array();
for ($n = 0; $n < 8; $n++)
{
for ($i = 0; $i < 50; $i++)
$array[] = $i;
}
$array = array_unique($array);