Test: (string) vs. concat

Concatenating to a string always results in a string, but isn't a cast faster?

Run this test again Return to test menu

Result: Discarded

The test labeled "(string)" was the faster by 0.0018 seconds, (0.169% faster)

(string) 100%

$string . '' 99.831%

The (string) test took 1.0654 seconds.
The $string . '' test took 1.0672 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 292,387 loops for a total of 5,847,740 runs.

Line execution difference (0.000000) milliseconds.
Avg difference (0.090) milliseconds per 292,387 loops.
Total difference 1.80 milliseconds for 5,847,740 loops

The iteration variablity for Code 1 was (2.6109) milliseconds and Code 2 was (1.9909) 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'] = (string) $j;

The second test, "$string . ''", was:

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

PHP Benchmarks