配列の重量除去、array_filpとarray_Unique効率比較

';
       echo 'run time:'.(float)(($endtime-$starttime)*1000).'ms
';
       echo 'use memory:'.getUseMemory();

       /**
        *       
        * @return float
        */
       function getUseMemory(){
           $use_memory = round(memory_get_usage(true)/1024,2).'kb';
           return $use_memory;
       }

       /**
        *   microtime
        * @return float
        */
       function getMicrotime(){
           list($usec, $sec) = explode(' ', microtime());
           return (float)$usec + (float)$sec;
       }
       ?>