Test: global vs. static

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Result: Saved

The test labeled "global" was the faster by 0.0089 seconds, (1.664% faster)

global 100%

static 98.336%

The global test took 0.5284 seconds.
The static test took 0.5373 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 138,186 loops for a total of 2,763,720 runs.

Line execution difference (0.000003) milliseconds.
Avg difference (0.447) milliseconds per 138,186 loops.
Total difference 8.94 milliseconds for 2,763,720 loops

The iteration variablity for Code 1 was (2.3638) milliseconds and Code 2 was (2.4361) 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);

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