Test: foreach reference writing

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Result: Discarded

The test labeled "non-referenced" was the faster by 0.0363 seconds, (5.158% faster)

non-referenced 100%

referenced 94.842%

The non-referenced test took 0.6675 seconds.
The referenced test took 0.7038 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 144,893 loops for a total of 2,897,860 runs.

Line execution difference (0.000013) milliseconds.
Avg difference (1.815) milliseconds per 144,893 loops.
Total difference 36.30 milliseconds for 2,897,860 loops

The iteration variablity for Code 1 was (7.8496) milliseconds and Code 2 was (7.3284) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "non-referenced", was:

foreach ($GLOBALS['dummy'] as $k => $v)
	$v[0]++;
unset($v);

The second test, "referenced", was:

foreach ($GLOBALS['dummy'] as $k => &$v)
	$v[0]++;
unset($v);

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