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.

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Historical Results

Based on (2) saved test runs, The test labeled "foreach" was (on average) the faster by 0.0043 seconds, (0.494% faster)

foreach 100%
while (next) 99.506%

The foreach test took 0.8715 seconds.
The while (next) test took 0.8758 seconds.


Each test case ran 20 random code order iterations consisting of 225,581 loops for a total of 4,511,620 runs.

  • Line execution difference (0.000001) milliseconds.
  • Avg difference (0.000) milliseconds per 225,581 loops.
  • Total difference 4.33 milliseconds for 4,511,620 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 (