Test: foreach key vs. no key

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Result: Discarded

The test labeled "without key" was the faster by 0.0252 seconds, (2.115% faster)

without key 100%

with key 97.885%

The without key test took 1.1641 seconds.
The with key test took 1.1892 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 270,949 loops for a total of 5,418,980 runs.

Line execution difference (0.000005) milliseconds.
Avg difference (1.258) milliseconds per 270,949 loops.
Total difference 25.16 milliseconds for 5,418,980 loops

The iteration variablity for Code 1 was (9.7607) milliseconds and Code 2 was (10.1812) 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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