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 (6) Run this test again Return to test menu

Result: Discarded

The test labeled "foreach" was the faster by 0.0171 seconds, (1.987% faster)

foreach 100%
while (next) 98.013%

The foreach test took 0.8416 seconds.
The while (next) test took 0.8586 seconds.


Each test case ran 20 random code order iterations consisting of 181,414 loops for a total of 3,628,280 runs.

  • Line execution difference (0.000005) milliseconds.
  • Avg difference (0.853) milliseconds per 181,414 loops.
  • Total difference 17.06 milliseconds for 3,628,280 loops

The iteration variablity for Code 1 was (6.9926) milliseconds and Code 2 was (10.1021) 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 (