PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: (string) vs. interpolate

Common from perl, many people use double quotes to force a string value.

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

Result: Discarded

The test labeled "(string)" was the faster by 0.045 seconds, (5.948% faster)

(string) 100%
"$string" 94.052%

The (string) test took 0.711 seconds.
The "$string" test took 0.756 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 195,447 loops for a total of 3,908,940 runs.

  • Line execution difference (0.000012) milliseconds.
  • Avg difference (2.249) milliseconds per 195,447 loops.
  • Total difference 44.97 milliseconds for 3,908,940 loops

The iteration variablity for Code 1 was (0.5004) milliseconds and Code 2 was (1.4587) 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 (7.2.19-1+ubuntu16.04.1+deb.sury.org+1)