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 (1) Run this test again Return to test menu

Result: Discarded

The test labeled "(string)" was the faster by 0.0003 seconds, (0.025% faster)

(string) 100%
"$string" 99.975%

The (string) test took 1.1822 seconds.
The "$string" test took 1.1825 seconds.


Each test case ran 20 random code order iterations consisting of 264,124 loops for a total of 5,282,480 runs.

  • Line execution difference (0.000000) milliseconds.
  • Avg difference (0.015) milliseconds per 264,124 loops.
  • Total difference 0.30 milliseconds for 5,282,480 loops

The iteration variablity for Code 1 was (12.6002) milliseconds and Code 2 was (10.8237) milliseconds. The lower and the closer together there values are the more accurate the results are.


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 (