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

Historical Results

Based on (1) saved test runs, The test labeled "$array[$n]" was (on average) the faster by 0.0246 seconds, (3.203% faster)

$array[$n] 100%
${'array_' . $n} 96.797%

The $array[$n] test took 0.7444 seconds.
The ${'array_' . $n} test took 0.769 seconds.


Each test case ran 20 random code order iterations consisting of 138,689 loops for a total of 2,773,780 runs.

  • Line execution difference (0.000009) milliseconds.
  • Avg difference (0.000) milliseconds per 138,689 loops.
  • Total difference 24.63 milliseconds for 2,773,780 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.


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 (