From 9e22e8be586addade3abaac520536175cda99fd4 Mon Sep 17 00:00:00 2001
From: Michael Bromley <michael@michaelbromley.co.uk>
Date: Tue, 28 Sep 2021 09:30:45 +0200
Subject: [PATCH] perf(core): Use request cache for hot-path tax rate
 calculation

---
 .../core/src/service/services/product-variant.service.ts    | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/packages/core/src/service/services/product-variant.service.ts b/packages/core/src/service/services/product-variant.service.ts
index a5baf7e190..6262e81562 100644
--- a/packages/core/src/service/services/product-variant.service.ts
+++ b/packages/core/src/service/services/product-variant.service.ts
@@ -592,10 +592,10 @@ export class ProductVariantService {
         if (!activeTaxZone) {
             throw new InternalServerError(`error.no-active-tax-zone`);
         }
-        const applicableTaxRate = await this.taxRateService.getApplicableTaxRate(
+        const applicableTaxRate = await this.requestCache.get(
             ctx,
-            activeTaxZone,
-            variant.taxCategory,
+            `applicableTaxRate-${activeTaxZone.id}-${variant.taxCategory.id}`,
+            () => this.taxRateService.getApplicableTaxRate(ctx, activeTaxZone, variant.taxCategory),
         );
 
         const { productVariantPriceCalculationStrategy } = this.configService.catalogOptions;