Test: multiply vs. add

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Result: Saved

The test labeled "multiply" was the faster by 0.0449 seconds, (4.614% faster)

multiply 100%

add 95.386%

The multiply test took 0.9282 seconds.
The add test took 0.9731 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 230,266 loops for a total of 4,605,320 runs.

Line execution difference (0.000010) milliseconds.
Avg difference (2.245) milliseconds per 230,266 loops.
Total difference 44.90 milliseconds for 4,605,320 loops

The iteration variablity for Code 1 was (4.2249) milliseconds and Code 2 was (4.3551) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "multiply", was:

$GLOBALS['dummy'] = 0;
for ($j = 0; $j < 100; $j++)
	$GLOBALS['dummy'] = $GLOBALS['dummy_int'] * 2;

The second test, "add", was:

$GLOBALS['dummy'] = 0;
for ($j = 0; $j < 100; $j++)
	$GLOBALS['dummy'] = $GLOBALS['dummy_int'] + $GLOBALS['dummy_int'];

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