From 35cfc6b5d3d7e2b67b7205d41959b28d22dbbca5 Mon Sep 17 00:00:00 2001
From: Steven Siloti <ssiloti@gmail.com>
Date: Fri, 23 Sep 2016 07:30:36 -0700
Subject: [PATCH] shrink peers vectors with too much excess capacity

---
 src/kademlia/dht_storage.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/kademlia/dht_storage.cpp b/src/kademlia/dht_storage.cpp
index c09ea4df1..51a09df55 100644
--- a/src/kademlia/dht_storage.cpp
+++ b/src/kademlia/dht_storage.cpp
@@ -525,6 +525,9 @@ namespace
 
 			m_counters.peers -= std::distance(new_end, peers.end());
 			peers.erase(new_end, peers.end());
+			// if we're using less than 1/4 of the capacity free up the excess
+			if (!peers.empty() && peers.capacity() / peers.size() >= 4u)
+				peers.shrink_to_fit();
 		}
 	};
 }