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代码优化-提升性能浅剖析:赛选奇偶数

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PHP中文网Original
2016-05-25 16:59:281261browse


 0.101s
        // [1] => 20801.063kb
        // [2] => 91326.813kb

        // [optimization]
        // [0] => 0.086s
        // [1] => 20800.875kb
        // [2] => 132924.938kb
    }


    //原始算法
    static function origin($data,$is_odd=false){

        $result=null;
        for ($i=0; $i < count($data); ++$i) {
            if ($data[$i]%2 == 0) {
                if (!$is_odd) {
                    $result[]=$data[$i];
                }
            } else {
                if ($is_odd) {
                    $result[]=$data[$i];
                }
            }
        }

        return $result;
    }


    //优化算法
    static function optimization($data,$is_odd=false){

        $odd=$even=null;
        $num=count($data);

        for ($i=0; $i < $num; ++$i) {
            if ($data[$i]%2 == 0) {
                $even[]=$data[$i];
            } else {
                $odd[]=$data[$i];
            }
        }

        return $is_odd ? $odd : $even;
    }


    //最佳算法
    static function best($data,$is_odd=false){
        //TODO 期待你的最佳算法
    }


}

                   

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