Test: array_diff vs. ==

Is using array_diff() better than an == check?

View test history (5) Run this test again Return to test menu

Result: Saved

The test labeled "array_diff()" was the faster by 0.0195 seconds, (2.749% faster)

array_diff() 100%

== 97.251%

The array_diff() test took 0.6887 seconds.
The == test took 0.7082 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 188,233 loops for a total of 3,764,660 runs.

Line execution difference (0.000005) milliseconds.
Avg difference (0.974) milliseconds per 188,233 loops.
Total difference 19.47 milliseconds for 3,764,660 loops

The iteration variablity for Code 1 was (0.8668) milliseconds and Code 2 was (0.8797) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "array_diff()", was:

for ($n = 0; $n < 20; $n++)
	$GLOBALS['dummy2'] = count(array_diff($GLOBALS['dummy'], $GLOBALS['dummy_pass'], $GLOBALS['dummy_pass2'])) === 0;
for ($n = 0; $n < 20; $n++)
	$GLOBALS['dummy2'] = count(array_diff($GLOBALS['dummy'], $GLOBALS['dummy_fail'], $GLOBALS['dummy_fail2'])) === 0;

The second test, "==", was:

for ($n = 0; $n < 20; $n++)
	$GLOBALS['dummy2'] = $GLOBALS['dummy'] == $GLOBALS['dummy_pass'] && $GLOBALS['dummy'] == $GLOBALS['dummy_pass2'];
for ($n = 0; $n < 20; $n++)
	$GLOBALS['dummy2'] = $GLOBALS['dummy'] == $GLOBALS['dummy_fail'] && $GLOBALS['dummy'] == $GLOBALS['dummy_fail2'];

PHP Benchmarks