Test: concat (string) vs. not

Is there any gain from casting to a string before concatenation?

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Result: Discarded

The test labeled "(string)" was the faster by 0.0126 seconds, (2.023% faster)

(string) 100%

no cast 97.977%

The (string) test took 0.6093 seconds.
The no cast test took 0.6219 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 149,303 loops for a total of 2,986,060 runs.

Line execution difference (0.000004) milliseconds.
Avg difference (0.629) milliseconds per 149,303 loops.
Total difference 12.58 milliseconds for 2,986,060 loops

The iteration variablity for Code 1 was (2.7204) milliseconds and Code 2 was (3.5133) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

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

for ($j = 0; $j < 1000; $j++)
	$GLOBALS['dummy'] = 'good morning! ' . (string) $j . ' good night!';

The second test, "no cast", was:

for ($j = 0; $j < 1000; $j++)
	$GLOBALS['dummy'] = 'good morning! ' . $j . ' good night!';

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