PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: foreach vs. while (next)

Some people say that next() is faster than a foreach. Is it really? Note that this code won't work at all if the array has false values in it.

View test history (3) Run this test again Return to test menu

Result: Discarded

The test labeled "while (next)" was the faster by 0.0282 seconds, (4.837% faster)

while (next) 100%
foreach 95.163%

The while (next) test took 0.5553 seconds.
The foreach test took 0.5835 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 133,046 loops for a total of 2,660,920 runs.

  • Line execution difference (0.000011) milliseconds.
  • Avg difference (1.411) milliseconds per 133,046 loops.
  • Total difference 28.22 milliseconds for 2,660,920 loops

The iteration variablity for Code 1 was (5.3525) milliseconds and Code 2 was (3.0890) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "foreach", was:

foreach ($GLOBALS['dummy'] as $v)
	$v[0] + 1;

The second test, "while (next)", was:

reset($GLOBALS['dummy']);
while (($v = next($GLOBALS['dummy'])) !== false)
	$v[0] + 1;

Running: Linux (x86_64:1 GB) PHP (7.2.25-1+ubuntu16.04.1+deb.sury.org+1)