From fe39fc1a609d1d1282d3df81cc484d78638538eb Mon Sep 17 00:00:00 2001
From: zhangmeng <775834166@qq.com>
Date: 星期四, 30 十二月 2021 17:48:09 +0800
Subject: [PATCH] performance

---
 src/nng_wrap.cpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/nng_wrap.cpp b/src/nng_wrap.cpp
index bf1fa01..d5e1928 100644
--- a/src/nng_wrap.cpp
+++ b/src/nng_wrap.cpp
@@ -209,7 +209,7 @@
             if (m_len > 0){
                 string tmp_msg{m, (size_t)m_len};
                 nn_freemsg(m);
-                auto topic{tmp_msg.c_str()};
+                const auto topic{tmp_msg.c_str()};
                 string msg{};
                 {
                     lock_guard<mutex> l{(*sub)()};

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