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

Historical Results

Based on (2) saved test runs, The test labeled "array_unique()" was (on average) the faster by 0.0144 seconds, (1.580% faster)

array_unique() 100%
array_keys(array_flip()) 98.42%

The array_unique() test took 0.8953 seconds.
The array_keys(array_flip()) test took 0.9097 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 208,299 loops for a total of 4,165,970 runs.

  • Line execution difference (0.000003) milliseconds.
  • Avg difference (0.000) milliseconds per 208,299 loops.
  • Total difference 14.38 milliseconds for 4,165,970 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(1,2,3,4,5,6,7,8,9);
$a = 1;

if (in_array(1,$array) || $a)
	$b = true;

$array = array_keys(array_flip($array));

The second test, "array_unique()", was:

$array = array(1,2,3,4,5,6,7,8,9);
$a = 1;

if ($a || in_array(1,$array))
	$b = true;

Running: Linux (x86_64:1 GB) PHP (7.2.25-1+ubuntu16.04.1+deb.sury.org+1)