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?

View test history (5) Run this test again Return to test menu

Result: Discarded

The test labeled "(string)" was the faster by 0.0125 seconds, (1.847% faster)

(string) 100%
$string . '' 98.153%

The (string) test took 0.6655 seconds.
The $string . '' test took 0.678 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 173,085 loops for a total of 3,461,700 runs.

  • Line execution difference (0.000004) milliseconds.
  • Avg difference (0.626) milliseconds per 173,085 loops.
  • Total difference 12.52 milliseconds for 3,461,700 loops

The iteration variablity for Code 1 was (1.4878) milliseconds and Code 2 was (2.4386) 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 (7.2.15-1+ubuntu16.04.1+deb.sury.org+1)