PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: set immediately or later

Is it better to put values inside array() when filling an array or to put values into it later?

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

Result: Saved

The test labeled "later" was the faster by 0.0089 seconds, (0.914% faster)

later 100%
immediate 99.086%

The later test took 0.9647 seconds.
The immediate test took 0.9736 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 215,645 loops for a total of 4,312,900 runs.

  • Line execution difference (0.000002) milliseconds.
  • Avg difference (0.445) milliseconds per 215,645 loops.
  • Total difference 8.90 milliseconds for 4,312,900 loops

The iteration variablity for Code 1 was (3.1607) milliseconds and Code 2 was (3.0385) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "immediate", was:

for ($i = 0; $i < 10; $i++)
	$GLOBALS['dummy2'] = array(
		0 => 'hello',
		1 => 'good bye',
		2 => 'thank you',
		3 => 'sorry',
	);

The second test, "later", was:

for ($i = 0; $i < 10; $i++)
{
	$GLOBALS['dummy2'] = array();
	$GLOBALS['dummy2'][0] = 'hello';
	$GLOBALS['dummy2'][1] = 'good bye';
	$GLOBALS['dummy2'][2] = 'thank you';
	$GLOBALS['dummy2'][3] = 'sorry';
}

Running: Linux (x86_64:1 GB) PHP (7.2.15-1+ubuntu16.04.1+deb.sury.org+1)