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 0.0136 seconds, (1.684% faster)

(string) 100%
"$string" 98.316%

The (string) test took 0.7948 seconds.
The "$string" test took 0.8084 seconds.


Each test case ran 20 random code order iterations consisting of 200,540 loops for a total of 4,010,800 runs.

  • Line execution difference (0.000003) milliseconds.
  • Avg difference (0.681) milliseconds per 200,540 loops.
  • Total difference 13.62 milliseconds for 4,010,800 loops

The iteration variablity for Code 1 was (0.9801) milliseconds and Code 2 was (1.3108) 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 (