PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: concat (string) vs. not

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

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Historical Results

Based on (1) saved test runs, The test labeled "(string)" was (on average) the faster by 0.0055 seconds, (1.100% faster)

(string) 100%
no cast 98.9%

The (string) test took 0.4928 seconds.
The no cast test took 0.4983 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 136,156 loops for a total of 2,723,120 runs.

  • Line execution difference (0.000002) milliseconds.
  • Avg difference (0.000) milliseconds per 136,156 loops.
  • Total difference 5.48 milliseconds for 2,723,120 loops

The iteration variablity for Code 1 was (0.0000) milliseconds and Code 2 was (0.0000) 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 (7.2.34-18+ubuntu16.04.1+deb.sury.org+1)