Test: foreach (fcall) vs. foreach ($temp)

Is the array being iterated cached? It could cause some nasty side effects to OOP if it is, but maybe PHP is smart about this.

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Result: Discarded

The test labeled "foreach (fcall)" was the faster by 0.0271 seconds, (2.682% faster)

foreach (fcall) 100%

foreach ($temp) 97.318%

The foreach (fcall) test took 0.9836 seconds.
The foreach ($temp) test took 1.0108 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 281,308 loops for a total of 5,626,160 runs.

Line execution difference (0.000005) milliseconds.
Avg difference (1.355) milliseconds per 281,308 loops.
Total difference 27.11 milliseconds for 5,626,160 loops

The iteration variablity for Code 1 was (0.4735) milliseconds and Code 2 was (0.6828) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "foreach (fcall)", was:

foreach (array_merge(range(1, 10), range(11, 20), range(21, 30), range(31, 40)) as $v)
	$GLOBALS['dummy2'] = $v;

The second test, "foreach ($temp)", was:

$temp = array_merge(range(1, 10), range(11, 20), range(21, 30), range(31, 40));
foreach ($temp as $v)
	$GLOBALS['dummy2'] = $v;

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