Test: array_push vs. [] =

According to the documentation, these are equivalent. Past tests have shown otherwise...

View test history (3) Run this test again Return to test menu

Result: Discarded

The test labeled "array_push()" was the faster by 0.0104 seconds, (1.148% faster)

array_push() 100%

$array[] = 98.852%

The array_push() test took 0.8936 seconds.
The $array[] = test took 0.904 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 211,034 loops for a total of 4,220,680 runs.

Line execution difference (0.000002) milliseconds.
Avg difference (0.519) milliseconds per 211,034 loops.
Total difference 10.38 milliseconds for 4,220,680 loops

The iteration variablity for Code 1 was (1.6719) milliseconds and Code 2 was (1.2806) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "array_push()", was:

$array = array();
for ($n = 0; $n < 8; $n++)
{
	for ($i = 0; $i < 50; $i++)
		array_push($array, $i);
}

The second test, "$array[] =", was:

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

PHP Benchmarks