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 (1) Run this test again Return to test menu

Result: Discarded

The test labeled "(string)" was the faster by 0.0095 seconds, (1.408% faster)

(string) 100%
no cast 98.592%

The (string) test took 0.6635 seconds.
The no cast test took 0.673 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 188,762 loops for a total of 3,775,240 runs.

  • Line execution difference (0.000003) milliseconds.
  • Avg difference (0.474) milliseconds per 188,762 loops.
  • Total difference 9.47 milliseconds for 3,775,240 loops

The iteration variablity for Code 1 was (0.6051) milliseconds and Code 2 was (0.8163) 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 (7.2.22-1+ubuntu16.04.1+deb.sury.org+1)