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 (5) Run this test again Return to test menu

Result: Saved

The test labeled ""$string"" was the faster by 0.0052 seconds, (0.579% faster)

"$string" 100%
(string) 99.421%

The "$string" test took 0.8871 seconds.
The (string) test took 0.8922 seconds.


Each test case ran 20 random code order iterations consisting of 214,432 loops for a total of 4,288,640 runs.

  • Line execution difference (0.000001) milliseconds.
  • Avg difference (0.259) milliseconds per 214,432 loops.
  • Total difference 5.17 milliseconds for 4,288,640 loops

The iteration variablity for Code 1 was (3.6337) milliseconds and Code 2 was (3.7614) 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 (