PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: pack v. sprintf

The documentation describes sprintf() using %c as similar to chr(). It's an arguably cleaner syntax (if only using chars) than pack() uses - is it faster?

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Result: Discarded

The test labeled "pack()" was the faster by 0.0149 seconds, (1.381% faster)

pack() 100%
sprintf() 98.619%

The pack() test took 1.0624 seconds.
The sprintf() test took 1.0773 seconds.


Each test case ran 20 random code order iterations consisting of 271,695 loops for a total of 5,433,900 runs.

  • Line execution difference (0.000003) milliseconds.
  • Avg difference (0.744) milliseconds per 271,695 loops.
  • Total difference 14.88 milliseconds for 5,433,900 loops

The iteration variablity for Code 1 was (6.4628) milliseconds and Code 2 was (6.1560) milliseconds. The lower and the closer together there values are the more accurate the results are.


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

$GLOBALS['dummy'] = pack('C4', 65, 65, 65, 65);

The second test, "sprintf()", was:

$GLOBALS['dummy'] = sprintf('%c%c%c%c', 65, 65, 65, 65);

Running: Linux (x86_64:1 GB) PHP (