Test: foreach key vs. no key

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Result: Discarded

The test labeled "with key" was the faster by 0.0218 seconds, (2.097% faster)

with key 100%

without key 97.903%

The with key test took 1.0173 seconds.
The without key test took 1.0391 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 284,504 loops for a total of 5,690,080 runs.

Line execution difference (0.000004) milliseconds.
Avg difference (1.090) milliseconds per 284,504 loops.
Total difference 21.79 milliseconds for 5,690,080 loops

The iteration variablity for Code 1 was (2.2059) milliseconds and Code 2 was (2.6351) 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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