PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: rand vs. array_rand (odd keys)

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Historical Results

Based on (1) saved test runs, The test labeled "rand()" was (on average) the faster by 0.0424 seconds, (5.459% faster)

rand() 100%
array_rand() 94.541%

The rand() test took 0.7349 seconds.
The array_rand() test took 0.7773 seconds.


Each test case ran 20 random code order iterations consisting of 122,354 loops for a total of 2,447,080 runs.

  • Line execution difference (0.000017) milliseconds.
  • Avg difference (0.000) milliseconds per 122,354 loops.
  • Total difference 42.44 milliseconds for 2,447,080 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.


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

$keys = array_keys($GLOBALS['array']);
$key = rand(0, count($keys) - 1);
$GLOBALS['dummy'] = $GLOBALS['array'][$keys[$key]];

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

$key = array_rand($GLOBALS['array'], 1);
$GLOBALS['dummy'] = $GLOBALS['array'][$key];

Running: Linux (x86_64:1 GB) PHP (