B2B-2243: Optimize addProductsToCart operations

Author: Roman Hanin

app/code/Magento/Quote/Model/Cart/AddProductsToCart.php

@@ -46,11 +46,6 @@ class AddProductsToCart
         'The requested qty is not available' => self::ERROR_INSUFFICIENT_STOCK,
     ];
 
-    /**
-     * @var ProductRepositoryInterface
-     */
-    private $productRepository;
-
     /**
      * @var CartRepositoryInterface
      */

app/code/Magento/Quote/Model/Cart/ProductReader.php

@@ -8,6 +8,7 @@
 namespace Magento\Quote\Model\Cart;
 
 use Magento\Catalog\Api\Data\ProductInterface;
+use Magento\Catalog\Model\ResourceModel\Product\Collection;
 use Magento\Catalog\Model\ResourceModel\Product\CollectionFactory as ProductCollectionFactory;
 use Magento\Quote\Model\Quote\Config;
 
@@ -31,6 +32,11 @@ class ProductReader implements ProductReaderInterface
      */
     private $quoteConfig;
 
+    /**
+     * @var Collection
+     */
+    private $productCollection;
+
     /**
      * @param ProductCollectionFactory $productCollectionFactory
      * @param Config $quoteConfig
@@ -44,7 +50,7 @@ public function __construct(
     }
 
     /**
-     * @inheirtdoc
+     * @inheirtDoc
      */
     public function loadProducts(array $skus, int $storeId): void
     {
@@ -66,6 +72,6 @@ public function loadProducts(array $skus, int $storeId): void
      */
     public function getProductBySku(string $sku) : ?ProductInterface
     {
-        return $this->productsBySku[$sku] ?: null;
+        return $this->productsBySku[$sku] ?? null;
     }
 }

app/code/Magento/Quote/Model/Quote.php

@@ -368,11 +368,6 @@ class Quote extends AbstractExtensibleModel implements \Magento\Quote\Api\Data\C
      */
     private $allowedCountriesReader;
 
-    /**
-     * @var Quote\Item[]
-     */
-    private $allItemsCache;
-
     /**
      * @param \Magento\Framework\Model\Context $context
      * @param \Magento\Framework\Registry $registry