From 459eaa5428d88e6148c6f97fc52a115e2b06aecd Mon Sep 17 00:00:00 2001
From: YunaiV <zhijiantianya@gmail.com>
Date: Wed, 6 May 2026 08:50:13 +0800
Subject: [PATCH] =?UTF-8?q?=E2=99=BB=EF=B8=8F=20refactor(im):=20=E4=BC=98?=
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改进消息存储时的处理逻辑，通过提前检查是否存在 _localFile 来优化性能，避免不必要的全量映射操作。
---
 src/views/im/home/store/conversationStore.ts | 21 ++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/src/views/im/home/store/conversationStore.ts b/src/views/im/home/store/conversationStore.ts
index fe2924feb..58c509074 100644
--- a/src/views/im/home/store/conversationStore.ts
+++ b/src/views/im/home/store/conversationStore.ts
@@ -268,14 +268,19 @@ export const useConversationStore = defineStore('imConversationStore', {
       ).filter((c) => !c.deleted)
       for (const conversation of conversationsToFlush) {
         // ① toRaw 拆掉 Vue reactive Proxy：IDB 的 structuredClone 不接受 Proxy，不拆会抛 DataCloneError 静默落盘失败（只 meta 写得进去，messages 永远丢）
-        // ② 剥掉 _localFile：IDB 能 structuredClone File 对象，但视频几百 MB 落盘没意义，刷新后媒体 SENDING / FAILED 重传也走不通
-        const messagesForFlush = toRaw(conversation.messages).map((message) => {
-          if (message._localFile == null) {
-            return message
-          }
-          const { _localFile: _omitted, ...rest } = message
-          return rest
-        })
+        // ② 剥 _localFile：IDB 能 structuredClone File 对象，但视频几百 MB 落盘没意义；
+        //    fast path：先扫一眼整条链路有无 _localFile，没有就直接 toRaw —— 绝大部分会话不会同时有上传中的媒体，每次 ack 都全量 map+spread 浪费
+        const rawMessages = toRaw(conversation.messages)
+        const hasLocalFile = rawMessages.some((message) => message._localFile != null)
+        const messagesForFlush = hasLocalFile
+          ? rawMessages.map((message) => {
+              if (message._localFile == null) {
+                return message
+              }
+              const { _localFile: _omitted, ...rest } = message
+              return rest
+            })
+          : rawMessages
         tasks.push(
           imStorage.setItem(
             StorageKeys.conversationMessages(userId, conversation.type, conversation.targetId),