Test: callback vs. if

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Result: Saved

The test labeled "callback" was the faster by 0.0165 seconds, (1.455% faster)

callback 100%

if 98.545%

The callback test took 1.1176 seconds.
The if test took 1.1341 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 272,933 loops for a total of 5,458,660 runs.

Line execution difference (0.000003) milliseconds.
Avg difference (0.825) milliseconds per 272,933 loops.
Total difference 16.50 milliseconds for 5,458,660 loops

The iteration variablity for Code 1 was (5.6783) milliseconds and Code 2 was (5.7725) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "callback", was:

if ($GLOBALS['dummy'] === 41)
	$cb = 'do_something1';
else
	$cb = 'do_something2';
$cb();

The second test, "if", was:

$v = 'do_something1';
if ($GLOBALS['dummy'] === 41)
	do_something1();
else
	do_something2();

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