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 0.062 seconds, (5.266% faster)

(string) 100%

no cast 94.734%

The (string) test took 1.1157 seconds.
The no cast test took 1.1777 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 276,486 loops for a total of 5,529,720 runs.

Line execution difference (0.000011) milliseconds.
Avg difference (3.101) milliseconds per 276,486 loops.
Total difference 62.01 milliseconds for 5,529,720 loops

The iteration variablity for Code 1 was (8.4704) milliseconds and Code 2 was (11.9190) 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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