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 (2) Run this test again Return to test menu

Result: Discarded

The test labeled "while (next)" was the faster by 0.0233 seconds, (2.076% faster)

while (next) 100%
foreach 97.924%

The while (next) test took 1.1013 seconds.
The foreach test took 1.1247 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 276,031 loops for a total of 5,520,620 runs.

  • Line execution difference (0.000004) milliseconds.
  • Avg difference (1.167) milliseconds per 276,031 loops.
  • Total difference 23.34 milliseconds for 5,520,620 loops

The iteration variablity for Code 1 was (4.8669) milliseconds and Code 2 was (4.1469) 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 (7.2.19-1+ubuntu16.04.1+deb.sury.org+1)