diff --git a/server/server.cpp b/server/server.cpp
index 343cd28..9d6d0b9 100644
--- a/server/server.cpp
+++ b/server/server.cpp
@@ -100,11 +100,12 @@ void CTcpServer::handle_frame()
             if (cache_.size() > 0) {
                 buf = cache_.front();
                 cache_.pop();
-            } else {
-                std::this_thread::sleep_for(std::chrono::milliseconds(100));
-                continue;
             }
         }
+        if (!buf) {
+            std::this_thread::sleep_for(std::chrono::milliseconds(100));
+            continue;
+        }
 
         // 拿到该包后，要看转发给谁或者处理
         if (buf->type_ == 199) {   // 询问在线客户端
@@ -130,11 +131,13 @@ void CTcpServer::send_simple_buf()
             if (scache_.size() > 0) {
                 buf = scache_.front();
                 scache_.pop();
-            } else {
-                std::this_thread::sleep_for(std::chrono::milliseconds(100));
-                continue;
             }
         }
+        if (!buf) {
+            std::this_thread::sleep_for(std::chrono::milliseconds(100));
+            continue;
+        }
+
         std::shared_ptr<asio::ip::tcp::socket> socket = nullptr;
         {
             std::lock_guard<std::mutex> clock(cli_mut_);