diff --git a/.changeset/shiny-roses-tap.md b/.changeset/shiny-roses-tap.md
new file mode 100644
index 0000000000..2f537c400b
--- /dev/null
+++ b/.changeset/shiny-roses-tap.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Disable Vite optimizer for sync and config loading. Improve first page load time for warm server startup.
diff --git a/packages/astro/src/core/config/vite-load.ts b/packages/astro/src/core/config/vite-load.ts
index 1a620ab90a..a0d4ee913e 100644
--- a/packages/astro/src/core/config/vite-load.ts
+++ b/packages/astro/src/core/config/vite-load.ts
@@ -11,7 +11,7 @@ export interface ViteLoader {
 async function createViteLoader(root: string, fs: typeof fsType): Promise<ViteLoader> {
 	const viteServer = await vite.createServer({
 		server: { middlewareMode: true, hmr: false },
-		optimizeDeps: { entries: [] },
+		optimizeDeps: { disabled: true },
 		clearScreen: false,
 		appType: 'custom',
 		ssr: {
diff --git a/packages/astro/src/core/sync/index.ts b/packages/astro/src/core/sync/index.ts
index ba55a22002..0017225d05 100644
--- a/packages/astro/src/core/sync/index.ts
+++ b/packages/astro/src/core/sync/index.ts
@@ -66,7 +66,7 @@ export async function sync(
 		await createVite(
 			{
 				server: { middlewareMode: true, hmr: false },
-				optimizeDeps: { entries: [] },
+				optimizeDeps: { disabled: true },
 				ssr: { external: [] },
 				logLevel: 'silent',
 			},