PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: integer vs. string keys

Note that integers are being accessed as integers, strings as strings. This is not testing auto-casting, just which is faster when used consistently.

Run this test again Return to test menu

Historical Results

Based on (2) saved test runs, The test labeled "integer" was (on average) the faster by 0.0473 seconds, (3.997% faster)

integer 100%
string 96.003%

The integer test took 1.1357 seconds.
The string test took 1.1829 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 257,904 loops for a total of 5,158,070 runs.

  • Line execution difference (0.000009) milliseconds.
  • Avg difference (0.000) milliseconds per 257,904 loops.
  • Total difference 47.29 milliseconds for 5,158,070 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, "integer", was:

$GLOBALS['dummy_i'][42] = 1;
$GLOBALS['dummy_i'][43] = 1;

$GLOBALS['dummy2'] = $GLOBALS['dummy_i'][42];
$GLOBALS['dummy2'] = $GLOBALS['dummy_i'][43];

unset($GLOBALS['dummy_i'][42]);
unset($GLOBALS['dummy_i'][43]);

The second test, "string", was:

$GLOBALS['dummy_s']['s42'] = 1;
$GLOBALS['dummy_s']['s43'] = 1;

$GLOBALS['dummy2'] = $GLOBALS['dummy_s']['s42'];
$GLOBALS['dummy2'] = $GLOBALS['dummy_s']['s43'];

unset($GLOBALS['dummy_s']['s42']);
unset($GLOBALS['dummy_s']['s43']);

Running: Linux (x86_64:1 GB) PHP (7.2.34-21+ubuntu16.04.1+deb.sury.org+1)