PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: create_function vs. closure outside loop

Using create_function vs anonymous lambda function outside loop

Run this test again Return to test menu

Historical Results

Based on (9) saved test runs, The test labeled "lambda" was (on average) the faster by 0.0153 seconds, (1.783% faster)

lambda 100%
create_function() 98.217%

The lambda test took 0.8441 seconds.
The create_function() test took 0.8594 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 194,476 loops for a total of 3,889,520 runs.

  • Line execution difference (0.000004) milliseconds.
  • Avg difference (0.000) milliseconds per 194,476 loops.
  • Total difference 15.33 milliseconds for 3,889,520 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.

Code

The first test, "lambda", was:

$a = $GLOBALS['a'];
$callback = function($n) { return $n; };
for($i = 0; $i < 100; ++$i) {
	array_map($callback, $a);
}

The second test, "create_function()", was:

$a = $GLOBALS['a'];
$callback = create_function('$n', 'return $n;');
for($i = 0; $i < 100; ++$i) {
	array_map($callback, $a);
}

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