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 (8) Run this test again Return to test menu

Result: Discarded

The test labeled "while (next)" was the faster by 0.0131 seconds, (1.298% faster)

while (next) 100%
foreach 98.702%

The while (next) test took 0.9983 seconds.
The foreach test took 1.0114 seconds.


Each test case ran 20 random code order iterations consisting of 233,308 loops for a total of 4,666,160 runs.

  • Line execution difference (0.000003) milliseconds.
  • Avg difference (0.656) milliseconds per 233,308 loops.
  • Total difference 13.13 milliseconds for 4,666,160 loops

The iteration variablity for Code 1 was (5.1006) milliseconds and Code 2 was (3.8136) 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 (