[2.3] Changed intval($val) to (int) $val, since it is faster:

app/code/Magento/Bundle/Model/Product/Type.php

@@ -6,13 +6,13 @@
 
 namespace Magento\Bundle\Model\Product;
 
-use Magento\Framework\App\ObjectManager;
+use Magento\Bundle\Model\ResourceModel\Selection\Collection as Selections;
+use Magento\Bundle\Model\ResourceModel\Selection\Collection\FilterApplier as SelectionCollectionFilterApplier;
 use Magento\Catalog\Api\ProductRepositoryInterface;
+use Magento\Framework\App\ObjectManager;
+use Magento\Framework\EntityManager\MetadataPool;
 use Magento\Framework\Pricing\PriceCurrencyInterface;
 use Magento\Framework\Serialize\Serializer\Json;
-use Magento\Framework\EntityManager\MetadataPool;
-use Magento\Bundle\Model\ResourceModel\Selection\Collection\FilterApplier as SelectionCollectionFilterApplier;
-use Magento\Bundle\Model\ResourceModel\Selection\Collection as Selections;
 
 /**
  * Bundle Type Model
@@ -537,7 +537,7 @@ public function updateQtyOption($options, \Magento\Framework\DataObject $option,
                 foreach ($options as $quoteItemOption) {
                     if ($quoteItemOption->getCode() == 'selection_qty_' . $selection->getSelectionId()) {
                         if ($optionUpdateFlag) {
-                            $quoteItemOption->setValue(intval($quoteItemOption->getValue()));
+                            $quoteItemOption->setValue((int) $quoteItemOption->getValue());
                         } else {
                             $quoteItemOption->setValue($value);
                         }

app/code/Magento/Catalog/Block/Product/Widget/NewWidget.php

@@ -139,7 +139,7 @@ public function getCacheKeyInfo()
             [
                 $this->getDisplayType(),
                 $this->getProductsPerPage(),
-                intval($this->getRequest()->getParam($this->getData('page_var_name'), 1)),
+                (int) $this->getRequest()->getParam($this->getData('page_var_name'), 1),
                 $this->serializer->serialize($this->getRequest()->getParams())
             ]
         );

app/code/Magento/Catalog/Model/Category.php

@@ -708,7 +708,7 @@ public function getParentId()
             return $parentId;
         }
         $parentIds = $this->getParentIds();
-        return intval(array_pop($parentIds));
+        return (int) array_pop($parentIds);
     }
 
     /**

app/code/Magento/Catalog/Model/ImageExtractor.php

@@ -36,7 +36,7 @@ public function process(\DOMElement $mediaNode, $mediaParentTag)
                     if ($attributeTagName === 'background') {
                         $nodeValue = $this->processImageBackground($attribute->nodeValue);
                     } elseif ($attributeTagName === 'width' || $attributeTagName === 'height') {
-                            $nodeValue = intval($attribute->nodeValue);
+                        $nodeValue = (int) $attribute->nodeValue;
                     } else {
                         $nodeValue = $attribute->nodeValue;
                     }

app/code/Magento/Catalog/Model/Product/Compare/Item.php

@@ -158,8 +158,8 @@ public function addProductData($product)
     {
         if ($product instanceof Product) {
             $this->setProductId($product->getId());
-        } elseif (intval($product)) {
-            $this->setProductId(intval($product));
+        } elseif ((int) $product) {
+            $this->setProductId((int) $product);
         }
 
         return $this;

app/code/Magento/Catalog/Model/Product/Option/Type/Date.php

@@ -102,11 +102,11 @@ public function validateUserValue($values)
             $this->setUserValue(
                 [
                     'date' => isset($value['date']) ? $value['date'] : '',
-                    'year' => isset($value['year']) ? intval($value['year']) : 0,
-                    'month' => isset($value['month']) ? intval($value['month']) : 0,
-                    'day' => isset($value['day']) ? intval($value['day']) : 0,
-                    'hour' => isset($value['hour']) ? intval($value['hour']) : 0,
-                    'minute' => isset($value['minute']) ? intval($value['minute']) : 0,
+                    'year' => isset($value['year']) ? (int) $value['year'] : 0,
+                    'month' => isset($value['month']) ? (int) $value['month'] : 0,
+                    'day' => isset($value['day']) ? (int) $value['day'] : 0,
+                    'hour' => isset($value['hour']) ? (int) $value['hour'] : 0,
+                    'minute' => isset($value['minute']) ? (int) $value['minute'] : 0,
                     'day_part' => isset($value['day_part']) ? $value['day_part'] : '',
                     'date_internal' => isset($value['date_internal']) ? $value['date_internal'] : '',
                 ]

app/code/Magento/Catalog/Model/Product/Option/Validator/DefaultValidator.php

@@ -168,6 +168,6 @@ protected function isInRange($value, array $range)
      */
     protected function isNegative($value)
     {
-        return intval($value) < 0;
+        return (int) $value < 0;
     }
 }

app/code/Magento/Catalog/Model/Product/PriceModifier.php

@@ -46,11 +46,11 @@ public function removeTierPrice(\Magento\Catalog\Model\Product $product, $custom
 
         foreach ($prices as $key => $tierPrice) {
             if ($customerGroupId == 'all' && $tierPrice['price_qty'] == $qty
-                && $tierPrice['all_groups'] == 1 && intval($tierPrice['website_id']) === intval($websiteId)
+                && $tierPrice['all_groups'] == 1 && (int) $tierPrice['website_id'] === (int) $websiteId
             ) {
                 unset($prices[$key]);
             } elseif ($tierPrice['price_qty'] == $qty && $tierPrice['cust_group'] == $customerGroupId
-                && intval($tierPrice['website_id']) === intval($websiteId)
+                && (int) $tierPrice['website_id'] === (int) $websiteId
             ) {
                 unset($prices[$key]);
             }

app/code/Magento/Catalog/Model/Product/TierPriceManagement.php

@@ -181,7 +181,7 @@ public function getList($sku, $customerGroupId)
 
         $prices = [];
         foreach ($product->getData('tier_price') as $price) {
-            if ((is_numeric($customerGroupId) && intval($price['cust_group']) === intval($customerGroupId))
+            if ((is_numeric($customerGroupId) && (int) $price['cust_group'] === (int) $customerGroupId)
                 || ($customerGroupId === 'all' && $price['all_groups'])
             ) {
                 /** @var \Magento\Catalog\Api\Data\ProductTierPriceInterface $tierPrice */

app/code/Magento/Catalog/Model/Product/Type.php

@@ -285,7 +285,7 @@ public function getTypesByPriority()
 
             $types = $this->getTypes();
             foreach ($types as $typeId => $typeInfo) {
-                $priority = isset($typeInfo['index_priority']) ? abs(intval($typeInfo['index_priority'])) : 0;
+                $priority = isset($typeInfo['index_priority']) ? abs((int) $typeInfo['index_priority']) : 0;
                 if (!empty($typeInfo['composite'])) {
                     $compositePriority[$typeId] = $priority;
                 } else {

app/code/Magento/Catalog/Model/ResourceModel/Category.php

@@ -664,7 +664,7 @@ public function getProductCount($category)
         $bind = ['category_id' => (int)$category->getId()];
         $counts = $this->getConnection()->fetchOne($select, $bind);
 
-        return intval($counts);
+        return (int) $counts;
     }
 
     /**

app/code/Magento/Catalog/Model/ResourceModel/Category/Flat.php

@@ -173,7 +173,7 @@ public function getMainTable()
     public function getMainStoreTable($storeId = \Magento\Store\Model\Store::DEFAULT_STORE_ID)
     {
         if (is_string($storeId)) {
-            $storeId = intval($storeId);
+            $storeId = (int) $storeId;
         }
 
         if ($storeId) {

app/code/Magento/CatalogInventory/Model/Quote/Item/QuantityValidator/Initializer/Option.php

@@ -121,7 +121,7 @@ public function initialize(
             /**
              * if option's qty was updates we also need to update quote item qty
              */
-            $quoteItem->setData('qty', intval($qty));
+            $quoteItem->setData('qty', (int) $qty);
         }
         if ($result->getMessage() !== null) {
             $option->setMessage($result->getMessage());

app/code/Magento/CatalogInventory/Model/StockStateProvider.php

@@ -9,9 +9,9 @@
 use Magento\Catalog\Model\ProductFactory;
 use Magento\CatalogInventory\Api\Data\StockItemInterface;
 use Magento\CatalogInventory\Model\Spi\StockStateProviderInterface;
+use Magento\Framework\DataObject\Factory as ObjectFactory;
 use Magento\Framework\Locale\FormatInterface;
 use Magento\Framework\Math\Division as MathDivision;
-use Magento\Framework\DataObject\Factory as ObjectFactory;
 
 /**
  * Interface StockStateProvider
@@ -113,13 +113,13 @@ public function checkQuoteItemQty(StockItemInterface $stockItem, $qty, $summaryQ
         $result->setItemIsQtyDecimal($stockItem->getIsQtyDecimal());
         if (!$stockItem->getIsQtyDecimal()) {
             $result->setHasQtyOptionUpdate(true);
-            $qty = intval($qty);
+            $qty = (int) $qty;
             /**
              * Adding stock data to quote item
              */
             $result->setItemQty($qty);
             $qty = $this->getNumber($qty);
-            $origQty = intval($origQty);
+            $origQty = (int) $origQty;
             $result->setOrigQty($origQty);
         }
 

app/code/Magento/CatalogWidget/Block/Product/ProductsList.php

@@ -164,7 +164,7 @@ public function getCacheKeyInfo()
             $this->_storeManager->getStore()->getId(),
             $this->_design->getDesignTheme()->getId(),
             $this->httpContext->getValue(\Magento\Customer\Model\Context::CONTEXT_GROUP),
-            intval($this->getRequest()->getParam($this->getData('page_var_name'), 1)),
+            (int) $this->getRequest()->getParam($this->getData('page_var_name'), 1),
             $this->getProductsPerPage(),
             $conditions,
             $this->json->serialize($this->getRequest()->getParams()),

app/code/Magento/Config/Block/System/Config/Form/Field/Datetime.php

@@ -40,7 +40,7 @@ public function __construct(
     protected function _getElementHtml(AbstractElement $element)
     {
         return $this->dateTimeFormatter->formatObject(
-            $this->_localeDate->date(intval($element->getValue())),
+            $this->_localeDate->date((int) $element->getValue()),
             $this->_localeDate->getDateTimeFormat(\IntlDateFormatter::MEDIUM)
         );
     }

app/code/Magento/Config/Block/System/Config/Form/Field/Notification.php

@@ -44,6 +44,6 @@ protected function _getElementHtml(AbstractElement $element)
         $format = $this->_localeDate->getDateTimeFormat(
             \IntlDateFormatter::MEDIUM
         );
-        return $this->dateTimeFormatter->formatObject($this->_localeDate->date(intval($element->getValue())), $format);
+        return $this->dateTimeFormatter->formatObject($this->_localeDate->date((int) $element->getValue()), $format);
     }
 }