PHP Benchmarks

Performance comparison of PHP code alternatives.

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 0.0441 seconds, (3.961% faster)

(string) 100%
$string . '' 96.039%

The (string) test took 1.0682 seconds.
The $string . '' test took 1.1122 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 267,792 loops for a total of 5,355,840 runs.

  • Line execution difference (0.000008) milliseconds.
  • Avg difference (2.203) milliseconds per 267,792 loops.
  • Total difference 44.06 milliseconds for 5,355,840 loops

The iteration variablity for Code 1 was (5.3194) milliseconds and Code 2 was (6.6169) 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 . '';

Running: Linux (x86_64:1 GB) PHP (7.2.25-1+ubuntu16.04.1+deb.sury.org+1)