Test: foreach key vs. no key

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Result: Discarded

The test labeled "without key" was the faster by 0.006 seconds, (1.344% faster)

without key 100%

with key 98.656%

The without key test took 0.4404 seconds.
The with key test took 0.4464 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 121,777 loops for a total of 2,435,540 runs.

Line execution difference (0.000002) milliseconds.
Avg difference (0.300) milliseconds per 121,777 loops.
Total difference 6.00 milliseconds for 2,435,540 loops

The iteration variablity for Code 1 was (1.4015) milliseconds and Code 2 was (0.2992) 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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