Test: array_unique vs. !isset (integers)

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 (5) saved test runs, The test labeled "!isset()" was (on average) the faster by 0.0166 seconds, (2.227% faster)

!isset() 100%

array_unique() 97.773%

The !isset() test took 0.7274 seconds.
The array_unique() test took 0.744 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 187,249 loops for a total of 3,744,980 runs.

Line execution difference (0.000004) milliseconds.
Avg difference (0.000) milliseconds per 187,249 loops.
Total difference 16.57 milliseconds for 3,744,980 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, "!isset()", was:

$array = array();
for ($n = 0; $n < 8; $n++)
	for ($i = 0; $i < 50; $i++)
	{
		if (!isset($array[$i]))
			$array[$i] = $i;
	}

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);

PHP Benchmarks