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 (2) saved test runs, The test labeled "(string)" was (on average) the faster by 0.027 seconds, (3.182% faster)

(string) 100%
no cast 96.818%

The (string) test took 0.8213 seconds.
The no cast test took 0.8483 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 217,584 loops for a total of 4,351,680 runs.

  • Line execution difference (0.000006) milliseconds.
  • Avg difference (0.000) milliseconds per 217,584 loops.
  • Total difference 26.99 milliseconds for 4,351,680 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 (7.2.19-1+ubuntu16.04.1+deb.sury.org+1)