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 0.046 seconds, (3.683% faster)

"$string" 100%
(string) 96.317%

The "$string" test took 1.2025 seconds.
The (string) test took 1.2485 seconds.


Each test case ran 20 random code order iterations consisting of 287,872 loops for a total of 5,757,440 runs.

  • Line execution difference (0.000008) milliseconds.
  • Avg difference (2.299) milliseconds per 287,872 loops.
  • Total difference 45.98 milliseconds for 5,757,440 loops

The iteration variablity for Code 1 was (7.0428) milliseconds and Code 2 was (7.3191) 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 (