Do not use webpack lazy imports for production

packages/next/src/build/webpack/loaders/next-app-loader.ts

@@ -280,13 +280,17 @@ async function createTreeCodeFromPath(
         const resolvedPagePath = await resolver(matchedPagePath)
         if (resolvedPagePath) pages.push(resolvedPagePath)
 
+        const pathStr = JSON.stringify(resolvedPagePath)
+        const importStatement =
+          process.env.NODE_ENV !== 'production'
+            ? `[() => import(/* webpackMode: "eager" */ ${pathStr}), ${pathStr}]`
+            : `import(${pathStr})`
+
         // Use '' for segment as it's the page. There can't be a segment called '' so this is the safest way to add it.
         props[
           normalizeParallelKey(parallelKey)
         ] = `['${PAGE_SEGMENT_KEY}', {}, {
-          page: [() => import(/* webpackMode: "eager" */ ${JSON.stringify(
-            resolvedPagePath
-          )}), ${JSON.stringify(resolvedPagePath)}],
+          page: ${importStatement},
           ${createMetadataExportsCode(metadata)}
         }]`