Test: concat (string) vs. not

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

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Result: Saved

The test labeled "(string)" was the faster by 0.0114 seconds, (1.096% faster)

(string) 100%

no cast 98.904%

The (string) test took 1.0308 seconds.
The no cast test took 1.0422 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 272,667 loops for a total of 5,453,340 runs.

Line execution difference (0.000002) milliseconds.
Avg difference (0.571) milliseconds per 272,667 loops.
Total difference 11.43 milliseconds for 5,453,340 loops

The iteration variablity for Code 1 was (2.6189) milliseconds and Code 2 was (2.6784) 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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