Как увеличить скорость выполнения кода. Я использовал некоторые вычисления на php

Как я могу сделать этот расчет быстрее, он очень медленный. Я много раз пробовал разными способами, но не смог. пожалуйста, кто-нибудь может мне помочь.

Я использовал Ajax и Jquery, чтобы получить значение из пользовательского ввода и вернуть это значение пользователю в Ajax.i использовал cakephp2.5. некоторые значения взяты из базы данных и моего кода контроллера. поэтому, пожалуйста, помогите сделать этот код быстрее.

public function getData(array $query=null){
    $findquery=$this->find('all',$query);
    return $findquery;
}

public function gettotal()
{
    $this->layout = 'ajax';
    $pcbx = $_POST['pcbx'];
    $pcby = $_POST['pcby'];
    $pcb_qty = $_POST['pcb_qty'];
    $smt_pads = $_POST['smt_pads'];
    $hole_pads = $_POST['hole_pads'];
    $fine_pitch = $_POST['fine_pitch'];
    $layers = $_POST['layers'];
    $pcbper = $_POST['pcbper'];
    if (!($pcbx > 350) && !($pcbx < 50) && !($pcby > 350) && !($pcby < 50) && !($pcb_qty < 1)) {
        $sum = ($pcb_qty * $pcby * $pcbx) / 1000000;
        if (!$layers == '0') {
            $query = array(
                'conditions' => array('layer' => $layers),
                'fields' => array('layer_value')
            );
            $check = $this->Layer_setup_pricemaster->getData($query);
            $layer_price = $check[0]['Layer_setup_pricemaster']['layer_value'];
        }

        /* get SMT Pads Point price based on condition the sum of pcbx, pcby and pcb Quantity is greater than or equal to min price and less than or equal to max_price from Per_point_pricemaster table*/
        $check101 = $this->Per_point_pricemaster->getData(array('condition' => array('id' => 22)));
        $end_price = $check101[21]['Per_point_pricemaster']['min_price'];
        if ($smt_pads != 0 && $smt_pads != ''){
            if ($sum >= $end_price){
                $query2 = array(
                    'conditions' => array('min_price ' => $end_price),
                    'limit' => 1,
                    'fields' => array('price')
                );
            }else{
                $query2 = array(
                    'conditions' => array('min_price <=' => $sum, 'max_price >=' => $sum),
                    'limit' => 1,
                    'fields' => array('price')
                );
            }
            $check2 = $this->Per_point_pricemaster->getData($query2);
            $point_price = $check2[0]['Per_point_pricemaster']['price'];
        }else {
            $point_price = 0;
        }

        /* get Through Hole Pads Point price based on condition the sum of pcbx, pcby and pcb Quantity is greater than or equal to min price and less than or equal to max_price from through_hole_padsmaster table*/
        $check102 = $this->Through_hole_padsmaster->getData(array('condition' => array('id' => 22)));
        $end_price2 = $check102[21]['Through_hole_padsmaster']['min_price'];
        if ($hole_pads != 0 && $hole_pads != ''){
            if ($sum >= $end_price2) {
                $query3 = array(
                    'conditions' => array('min_price ' => $end_price2),
                    'limit' => 1,
                    'fields' => array('price')
                );
            }else {
                $query3 = array(
                    'conditions' => array('min_price <=' => $sum, 'max_price >=' => $sum),
                    'limit' => 1,
                    'fields' => array('price')
                );
            }
            $check3 = $this->Through_hole_padsmaster->getData($query3);
            $hole_pads_price = $check3[0]['Through_hole_padsmaster']['price'];
        }else {
            $hole_pads_price = 0;
        }

        /* Get the Stencil Price from stencil_pricemaster table which is by default id=5 */
        $query4 = array(
            'conditions' => array('id' => 5),
            'fields' => array('including_tax')
        );
        $check4 = $this->Stencil_pricemaster->getData($query4);
        $stencil_price = $check4[0]['Stencil_pricemaster']['including_tax'];

        if ($fine_pitch != 0 && $fine_pitch != ''){
            /* Get BGA/QFN/Fine Pitch Point Price from bga_qfnmaster table wich is by default id=1 */
            $query5 = array(
                'conditions' => array('id' => 1),
                'fields' => array('price')
            );
            $check5 = $this->Bga_qfnmaster->getData($query5);
            $bga_qfn_price = $check5[0]['Bga_qfnmaster']['price'];
        }else {
            $bga_qfn_price = 0;
        }

        if (!empty($pcbper) && $pcbper != '0'){
            $pointsum1 = $smt_pads * $point_price * $pcb_qty * $pcbper;
            $pointsum2 = $hole_pads * $hole_pads_price * $pcb_qty * $pcbper;
            $pointsum3 = $fine_pitch * $bga_qfn_price * $pcb_qty * $pcbper;
            if (!$layers == '0') {
                $total = $pointsum1+ $pointsum2 + $pointsum3 + $layer_price + $stencil_price;
            } else {
                $total = $pointsum1 + $pointsum2 + $pointsum3;
            }
        } else{
            $pointsum1 = $smt_pads * $point_price * $pcb_qty;
            $pointsum2 = $hole_pads * $hole_pads_price * $pcb_qty;
            $pointsum3 = $fine_pitch * $bga_qfn_price * $pcb_qty;
            if (!$layers == '0') {
                $total = $pointsum1 + $pointsum2 + $pointsum3 + $layer_price + $stencil_price;
            } else {
                $total = $pointsum1 + $pointsum2 + $pointsum3;
            }
        }
        echo $total = number_format($total);
    } else {
        echo "Calculating...";
    }
    exit;
}