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.)

View test history (4) Run this test again Return to test menu

Result: Discarded

The test labeled "chr()" was the faster by 0.1116 seconds, (8.613% faster)

chr() 100%
literal 91.387%

The chr() test took 1.1837 seconds.
The literal test took 1.2953 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 276,669 loops for a total of 5,533,380 runs.

  • Line execution difference (0.000020) milliseconds.
  • Avg difference (5.578) milliseconds per 276,669 loops.
  • Total difference 111.56 milliseconds for 5,533,380 loops

The iteration variablity for Code 1 was (5.9098) milliseconds and Code 2 was (7.9389) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

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

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

The second test, "literal", was:

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

Running: Linux (x86_64:1 GB) PHP (7.2.25-1+ubuntu16.04.1+deb.sury.org+1)