PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: global vs. static

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Result: Discarded

The test labeled "static" was the faster by 0.0179 seconds, (2.770% faster)

static 100%
global 97.23%

The static test took 0.6276 seconds.
The global test took 0.6455 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 134,551 loops for a total of 2,691,020 runs.

  • Line execution difference (0.000007) milliseconds.
  • Avg difference (0.894) milliseconds per 134,551 loops.
  • Total difference 17.88 milliseconds for 2,691,020 loops

The iteration variablity for Code 1 was (7.5186) milliseconds and Code 2 was (6.0359) 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 (7.2.25-1+ubuntu16.04.1+deb.sury.org+1)