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

Historical Results

Based on (3) saved test runs, The test labeled "chr()" was (on average) the faster by 0.029 seconds, (3.030% faster)

chr() 100%
literal 96.97%

The chr() test took 0.9283 seconds.
The literal test took 0.9573 seconds.


Each test case ran 20 random code order iterations consisting of 235,976 loops for a total of 4,719,520 runs.

  • Line execution difference (0.000006) milliseconds.
  • Avg difference (0.000) milliseconds per 235,976 loops.
  • Total difference 29.01 milliseconds for 4,719,520 loops

The iteration variablity for Code 1 was (0.0000) milliseconds and Code 2 was (0.0000) 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 (