PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: arrays vs. variables

Not that using variables like this is good style, and array1 already mostly answers this.

View test history (2) Run this test again Return to test menu

Result: Discarded

The test labeled "$array[$n]" was the faster by 0.002 seconds, (0.252% faster)

$array[$n] 100%
${'array_' . $n} 99.748%

The $array[$n] test took 0.7748 seconds.
The ${'array_' . $n} test took 0.7768 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 164,724 loops for a total of 3,294,480 runs.

  • Line execution difference (0.000001) milliseconds.
  • Avg difference (0.098) milliseconds per 164,724 loops.
  • Total difference 1.96 milliseconds for 3,294,480 loops

The iteration variablity for Code 1 was (5.9998) milliseconds and Code 2 was (7.5846) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "$array[$n]", was:

$array = array();
for ($i = 0; $i < 100; $i++)
	$array[$i] = $i;

The second test, "${'array_' . $n}", was:

for ($i = 0; $i < 100; $i++)
	${'array_' . $i} = $i;

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