@@ -94,7 +94,7 @@ import {
   serveRawFsMiddleware,
   serveStaticMiddleware,
 } from './middlewares/static'
-import { timeMiddleware } from './middlewares/time'
+import { isTimeDebugEnabled, timeMiddleware } from './middlewares/time'
 import {
   cachedTransformMiddleware,
   transformMiddleware,
@@ -989,7 +989,7 @@ export async function _createServer(
   // Pre applied internal middlewares ------------------------------------------
 
   // request timer
-  if (process.env.DEBUG) {
+  if (isTimeDebugEnabled) {
     middlewares.use(timeMiddleware(root))
   }
 
 
@@ -4,6 +4,8 @@ import { createDebugger, prettifyUrl, timeFrom } from '../../utils'
 
 const logTime = createDebugger('vite:time')
 
+export const isTimeDebugEnabled: boolean = logTime !== undefined
+
 export function timeMiddleware(root: string): Connect.NextHandleFunction {
   // Keep the named function. The name is visible in debug logs via `DEBUG=connect:dispatcher ...`
   return function viteTimeMiddleware(req, res, next) {