PHP Benchmarks

Performance comparison of PHP code alternatives.

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 menu

Result: Discarded

The test labeled "array_unique()" was the faster by 0.0039 seconds, (0.794% faster)

array_unique() 100%
array_keys(array_flip()) 99.206%

The array_unique() test took 0.4819 seconds.
The array_keys(array_flip()) test took 0.4857 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 136,046 loops for a total of 2,720,920 runs.

  • Line execution difference (0.000001) milliseconds.
  • Avg difference (0.193) milliseconds per 136,046 loops.
  • Total difference 3.86 milliseconds for 2,720,920 loops

The iteration variablity for Code 1 was (0.6088) milliseconds and Code 2 was (0.1662) 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);

Running: Linux (x86_64:1 GB) PHP (7.2.34-18+ubuntu16.04.1+deb.sury.org+1)