PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: chr v. literal

How much worse is chr() than just a literal (if it's cleanly representable.)

Run this test again Return to test menu

Result: Discarded

The test labeled "chr()" was the faster by 0.0614 seconds, (7.017% faster)

chr() 100%
literal 92.983%

The chr() test took 0.8139 seconds.
The literal test took 0.8754 seconds.


Each test case ran 20 random code order iterations consisting of 211,140 loops for a total of 4,222,800 runs.

  • Line execution difference (0.000015) milliseconds.
  • Avg difference (3.071) milliseconds per 211,140 loops.
  • Total difference 61.42 milliseconds for 4,222,800 loops

The iteration variablity for Code 1 was (3.0108) milliseconds and Code 2 was (5.0950) milliseconds. The lower and the closer together there values are the more accurate the results are.


The first test, "chr()", was:

$GLOBALS['dummy'] = chr(65);

The second test, "literal", was:

$GLOBALS['dummy'] = 'A';

Running: Linux (x86_64:1 GB) PHP (