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.

Run this test again Return to test menu

Historical Results

Based on (3) saved test runs, The test labeled "foreach" was (on average) the faster by 0.0286 seconds, (2.853% faster)

foreach 100%
while (next) 97.147%

The foreach test took 0.973 seconds.
The while (next) test took 1.0015 seconds.


Each test case ran 20 random code order iterations consisting of 184,668 loops for a total of 3,693,367 runs.

  • Line execution difference (0.000008) milliseconds.
  • Avg difference (0.000) milliseconds per 184,668 loops.
  • Total difference 28.58 milliseconds for 3,693,367 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, "foreach", was:

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

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

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

Running: Linux (x86_64:1 GB) PHP (