From 7bf5934d8516096dfa31722ab6b5f05497059239 Mon Sep 17 00:00:00 2001
From: snyh <snyh@snyh.org>
Date: Fri, 4 Jun 2021 16:19:30 +0800
Subject: [PATCH] perf/basic_host: Don't handle address change if we hasn't
 anyone

---
 p2p/host/basic/basic_host.go | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/p2p/host/basic/basic_host.go b/p2p/host/basic/basic_host.go
index d0c23af9aa..54470a86df 100644
--- a/p2p/host/basic/basic_host.go
+++ b/p2p/host/basic/basic_host.go
@@ -520,8 +520,11 @@ func (h *BasicHost) background() {
 	defer ticker.Stop()
 
 	for {
-		h.updateLocalIpAddr()
-		curr := h.Addrs()
+		var curr []ma.Multiaddr
+		if len(h.network.ListenAddresses()) > 0 {
+			h.updateLocalIpAddr()
+			curr = h.Addrs()
+		}
 		emitAddrChange(curr, lastAddrs)
 		lastAddrs = curr