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 (1) Run this test again Return to test menu

Result: Discarded

The test labeled "$string . ''" was the faster by 0.004 seconds, (0.460% faster)

$string . '' 100%
(string) 99.54%

The $string . '' test took 0.8577 seconds.
The (string) test took 0.8617 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 234,220 loops for a total of 4,684,400 runs.

  • Line execution difference (0.000001) milliseconds.
  • Avg difference (0.198) milliseconds per 234,220 loops.
  • Total difference 3.96 milliseconds for 4,684,400 loops

The iteration variablity for Code 1 was (1.5215) milliseconds and Code 2 was (0.4759) 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)