add vercel speed-insights

src/layouts/Layout.astro

@@ -19,6 +19,7 @@ import { defaultFavicons } from "../constants/icon";
 import type { Favicon } from "../types/config";
 import { pathsEqual, url } from "../utils/url-utils";
 import "katex/dist/katex.css";
+import SpeedInsights from "@vercel/speed-insights/astro";
 
 interface Props {
 	title?: string;
@@ -154,6 +155,8 @@ const bannerOffset =
 		<ConfigCarrier></ConfigCarrier>
 		<slot />
 
+		<SpeedInsights />
+
 		<!-- increase the page height during page transition to prevent the scrolling animation from jumping -->
 		<div id="page-height-extend" class="hidden h-[300vh]"></div>
 	</body>