PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: chr v. pack

Note that this test uses concatenation for many chr()'s vs. one pack(). In a case with many calls to pack(), the result might be different (but this is a less common use.)

Run this test again Return to test menu

Historical Results

Based on (6) saved test runs, The test labeled "chr()" was (on average) the faster by 0.0127 seconds, (1.537% faster)

chr() 100%
pack() 98.463%

The chr() test took 0.8159 seconds.
The pack() test took 0.8287 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 194,026 loops for a total of 3,880,510 runs.

  • Line execution difference (0.000003) milliseconds.
  • Avg difference (0.000) milliseconds per 194,026 loops.
  • Total difference 12.74 milliseconds for 3,880,510 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.

Code

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

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

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

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

Running: Linux (x86_64:1 GB) PHP (7.2.22-1+ubuntu16.04.1+deb.sury.org+1)