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.

Run this test again Return to test menu

Result: Discarded

The test labeled "${'array_' . $n}" was the faster by 0.0241 seconds, (2.980% faster)

${'array_' . $n} 100%
$array[$n] 97.02%

The ${'array_' . $n} test took 0.7856 seconds.
The $array[$n] test took 0.8098 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 197,681 loops for a total of 3,953,620 runs.

  • Line execution difference (0.000006) milliseconds.
  • Avg difference (1.207) milliseconds per 197,681 loops.
  • Total difference 24.13 milliseconds for 3,953,620 loops

The iteration variablity for Code 1 was (5.1084) milliseconds and Code 2 was (3.0359) 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)