Re: [Wikitech-l] Closure creation benchmark

[Daniel Kinzler]

Apperently the attached file got stripped when posting to the list.
Here's a link:

http://brightbyte.de/repos/codebin/ClosureBenchmark.php?view=1

Here is the code inlined:

<?php

function timeClosures( $n ) {
        $start = microtime( true );

        for ( $i = 0; $i < $n; $i++ ) {
                $closure = function( $x ) use ( $i ) { return $i*$x; };
        }

        $sec = microtime( true ) - $start;
        print "  It took $sec seconds to create $n closures.\n";

        return $sec;
}

class ClosureBenchmarkTestClass {
        private $x;

        public function __construct( $x ) {
                $this->x = $x;
        }

        public function foo( $y ) {
                return $this->x * $y;
        }
}

function timeObjects( $n ) {
        $start = microtime( true );

        for ( $i = 0; $i < $n; $i++ ) {
                $obj = new ClosureBenchmarkTestClass( $i );
        }

        $sec = microtime( true ) - $start;
        print "  It took $sec seconds to create $n objects.\n";

        return $sec;
}

$m = 10;
$n = 1000000;

for ( $i = 0; $i < $m; $i++ ) {
        $ctime = timeClosures( $n );
        $otime = timeObjects( $n );

        $dtime = $ctime - $otime;
        $rtime = ( $ctime / $otime );
        $fasterOrSlower = $dtime > 0 ? 'faster' : 'slower';
        print sprintf( "Creating %d objects was %f seconds %s (%d%%).\n", $n, 
abs(
$dtime ), $fasterOrSlower, abs( $rtime ) * 100 );
}





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