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 (1) saved test runs, The test labeled "foreach" was (on average) the faster by 0.0862 seconds, (6.453% faster)

foreach 100%
while (next) 93.547%

The foreach test took 1.2495 seconds.
The while (next) test took 1.3356 seconds.


Each test case ran 20 random code order iterations consisting of 290,564 loops for a total of 5,811,280 runs.

  • Line execution difference (0.000015) milliseconds.
  • Avg difference (0.000) milliseconds per 290,564 loops.
  • Total difference 86.18 milliseconds for 5,811,280 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 (