PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: concat (string) vs. not

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

View test history (2) Run this test again Return to test menu

Result: Discarded

The test labeled "(string)" was the faster by 0.0079 seconds, (1.016% faster)

(string) 100%
no cast 98.984%

The (string) test took 0.7669 seconds.
The no cast test took 0.7748 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 193,777 loops for a total of 3,875,540 runs.

  • Line execution difference (0.000002) milliseconds.
  • Avg difference (0.394) milliseconds per 193,777 loops.
  • Total difference 7.87 milliseconds for 3,875,540 loops

The iteration variablity for Code 1 was (2.8800) milliseconds and Code 2 was (2.6024) 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!';

Running: Linux (x86_64:1 GB) PHP (7.2.19-1+ubuntu16.04.1+deb.sury.org+1)