Test: foreach reference reading

No Description

Run this test again Return to test menu

Result: Discarded

The test labeled "non-referenced" was the faster by 0.0259 seconds, (2.528% faster)

non-referenced 100%

referenced 97.472%

The non-referenced test took 0.998 seconds.
The referenced test took 1.0238 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 282,064 loops for a total of 5,641,280 runs.

Line execution difference (0.000005) milliseconds.
Avg difference (1.294) milliseconds per 282,064 loops.
Total difference 25.88 milliseconds for 5,641,280 loops

The iteration variablity for Code 1 was (1.6986) milliseconds and Code 2 was (2.6037) 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)
	$v[0] + 1;
unset($v);

The second test, "referenced", was:

foreach ($GLOBALS['dummy'] as $k => &$v)
	$v[0] + 1;
unset($v);

PHP Benchmarks