From e084ee7b3a5b9adcb5eccb4945b8948d509ab0d1 Mon Sep 17 00:00:00 2001
From: Michael Brevard <yonshi29@gmail.com>
Date: Fri, 29 Dec 2023 12:17:07 +0200
Subject: [PATCH] perf(nuxt): use single iteration when normalising routes
 (#24946)

---
 packages/nuxt/src/pages/utils.ts | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/packages/nuxt/src/pages/utils.ts b/packages/nuxt/src/pages/utils.ts
index 94dcf70e21..f24ba65aa5 100644
--- a/packages/nuxt/src/pages/utils.ts
+++ b/packages/nuxt/src/pages/utils.ts
@@ -303,11 +303,12 @@ export function normalizeRoutes (routes: NuxtPage[], metaImports: Set<string> =
   return {
     imports: metaImports,
     routes: genArrayFromRaw(routes.map((page) => {
-      const route = Object.fromEntries(
-        Object.entries(page)
-          .filter(([key, value]) => key !== 'file' && (Array.isArray(value) ? value.length : value))
-          .map(([key, value]) => [key, JSON.stringify(value)])
-      ) as Record<Exclude<keyof NuxtPage, 'file'>, string> & { component?: string }
+      const route: Record<Exclude<keyof NuxtPage, 'file'>, string> & { component?: string } = Object.create(null)
+      for (const [key, value] of Object.entries(page)) {
+        if (key !== 'file' && (Array.isArray(value) ? value.length : value)) { 
+          route[key as Exclude<keyof NuxtPage, 'file'>] = JSON.stringify(value)
+        }
+      }
 
       if (page.children?.length) {
         route.children = normalizeRoutes(page.children, metaImports).routes