Test: foreach key vs. no key

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Result: Discarded

The test labeled "with key" was the faster by 0.0097 seconds, (1.255% faster)

with key 100%

without key 98.745%

The with key test took 0.7612 seconds.
The without key test took 0.7709 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 174,001 loops for a total of 3,480,020 runs.

Line execution difference (0.000003) milliseconds.
Avg difference (0.484) milliseconds per 174,001 loops.
Total difference 9.68 milliseconds for 3,480,020 loops

The iteration variablity for Code 1 was (1.8787) milliseconds and Code 2 was (2.3498) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "with key", was:

foreach ($GLOBALS['dummy'] as $k => $v)
	$v + array(1);

The second test, "without key", was:

foreach ($GLOBALS['dummy'] as $v)
	$v + array(1);

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