PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: global vs. static

No Description

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Result: Discarded

The test labeled "static" was the faster by 0.0132 seconds, (2.395% faster)

static 100%
global 97.605%

The static test took 0.5365 seconds.
The global test took 0.5497 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 132,010 loops for a total of 2,640,200 runs.

  • Line execution difference (0.000005) milliseconds.
  • Avg difference (0.658) milliseconds per 132,010 loops.
  • Total difference 13.16 milliseconds for 2,640,200 loops

The iteration variablity for Code 1 was (3.1387) milliseconds and Code 2 was (1.9667) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "global", was:

/*
function foo_global($i)
{
	global $dummy;

	$dummy = $i;
}
*/

for ($i = 0; $i < 100; $i++)
	foo_global($i);

The second test, "static", was:

/*
function foo_static($i)
{
	static $dummy = null;

	$dummy = $i;
}
*/

for ($i = 0; $i < 100; $i++)
	foo_static($i);

Running: Linux (x86_64:1 GB) PHP (7.2.19-1+ubuntu16.04.1+deb.sury.org+1)