[TYPO3-dev] FYI: comparing execution speed of some php functions

[Steffen Kamper]

Hi Niels,

no - it'S a different issue.

I tried with adding this to Rupi's script:

$GLOBALS['myClass'] = new  mytestclass();
$S = microtime(TRUE);
for ($i = 0; $i < $num; ++ $i) {
	$GLOBALS['myClass']->testfunc(1);
}
$E = microtime(TRUE) - $S;
echo "global object call took \t" . number_format(floatval($E * 1000), 
5) . " ms\n";

these are the results:
calling methods in classes:
---------------------------------------------
object call took 		347.18299 ms
derived object call took 	359.87806 ms
static call took 		523.85497 ms
global object call took 	375.33998 ms

(oh god, my numbers are 8 times slower than Rupis, what's wrong with my 
machine?)

but, after isolating the object calls (removing all other tests) i got 
incredible different results:

object call took 		0.02289 ms
derived object call took 	0.01001 ms
static call took 		0.00811 ms
global object call took 	0.00811 ms

and this is completely the other way showing that static class calls are 
faster than object calls.

As this example shows, don't trust results before you did an isolate 
test. The performance of php completely change after filling memory etc.

vg Steffen