Příručka stylu psaní: Porovnání verzí
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(→Static vs. normal methods/members/variables) |
(→Static vs. normal methods/members/variables) |
||
| Řádek 5: | Řádek 5: | ||
==Static vs. normal methods/members/variables== | ==Static vs. normal methods/members/variables== | ||
| − | In PHP, static is slower (see http://stackoverflow.com/questions/1472721/php-performance-of-static-methods-vs-functions). | + | |
| + | *Static variables are | ||
| + | *In PHP, static is slower (see http://stackoverflow.com/questions/1472721/php-performance-of-static-methods-vs-functions). | ||
Try this example: | Try this example: | ||
| − | |||
<?php | <?php | ||
class Normal { | class Normal { | ||
Verze z 25. 5. 2011, 11:17
Pro inspiraci:
- http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml
- http://www.kernel.org/doc/Documentation/CodingStyle
- http://en.wikipedia.org/wiki/Indent_style#K.26R_style]
Static vs. normal methods/members/variables
- Static variables are
- In PHP, static is slower (see http://stackoverflow.com/questions/1472721/php-performance-of-static-methods-vs-functions).
Try this example:
<?php
class Normal {
public $x=0;
}
class Statik {
public static $x=0;
}
$limit=50000;
$mem1=memory_get_usage();
$time1=microtime(true);
$normal=new Normal();
echo "Normal object test:
";
for ($i=0; $i<$limit; $i++) {
$normal->x=$normal->x+$i;
}
echo $normal->x."
";
$mem2=memory_get_usage();
$time2=microtime(true);
echo "Static object test:
";
for ($i=0; $i<$limit; $i++) {
Statik::$x=Statik::$x+$i;
}
echo Statik::$x."
";
$mem3=memory_get_usage();
$time3=microtime(true);
printf("Normal: Memory=%d time=%f
", $mem2-$mem1, $time2-$time1);
printf("Static: Memory=%d time=%f
", $mem3-$mem2, $time3-$time2);
?>
Result
Normal: Memory=728 time=0.049930 Static: Memory=220 time=0.057258
