From 41a00dff62ee2ae60099953b1d3cc91f7bad0d7d Mon Sep 17 00:00:00 2001
From: ygj6 <yuangongji@foxmail.com>
Date: Fri, 23 Jul 2021 20:39:12 +0800
Subject: [PATCH] fix: fix pre-bundling executes multiple times (#3640)

---
 packages/vite/src/node/server/index.ts | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/packages/vite/src/node/server/index.ts b/packages/vite/src/node/server/index.ts
index d380d0029b1a9c..a64d13a5e0fafd 100644
--- a/packages/vite/src/node/server/index.ts
+++ b/packages/vite/src/node/server/index.ts
@@ -548,15 +548,19 @@ export async function createServer(
   }
 
   if (!middlewareMode && httpServer) {
+    let isOptimized = false
     // overwrite listen to run optimizer before server start
     const listen = httpServer.listen.bind(httpServer)
     httpServer.listen = (async (port: number, ...args: any[]) => {
-      try {
-        await container.buildStart({})
-        await runOptimize()
-      } catch (e) {
-        httpServer.emit('error', e)
-        return
+      if (!isOptimized) {
+        try {
+          await container.buildStart({})
+          await runOptimize()
+          isOptimized = true
+        } catch (e) {
+          httpServer.emit('error', e)
+          return
+        }
       }
       return listen(port, ...args)
     }) as any