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.)

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Result: Discarded

The test labeled "chr()" was the faster by 0.0172 seconds, (1.556% faster)

chr() 100%
literal 98.444%

The chr() test took 1.09 seconds.
The literal test took 1.1072 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 279,900 loops for a total of 5,598,000 runs.

  • Line execution difference (0.000003) milliseconds.
  • Avg difference (0.862) milliseconds per 279,900 loops.
  • Total difference 17.23 milliseconds for 5,598,000 loops

The iteration variablity for Code 1 was (3.6270) milliseconds and Code 2 was (3.7982) 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)