Index: source/network/NetStats.cpp
===================================================================
--- source/network/NetStats.cpp
+++ source/network/NetStats.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2019 Wildfire Games.
+/* Copyright (C) 2023 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -21,6 +21,31 @@
 
 #include "lib/external_libraries/enet.h"
 
+#include <fmt/format.h>
+#include <string>
+
+namespace
+{
+float PacketLossNormalize(const enet_uint32 v) noexcept
+{
+	static_assert(ENET_PEER_PACKET_LOSS_SCALE != 0);
+	return static_cast<float>(v) / static_cast<float>(ENET_PEER_PACKET_LOSS_SCALE);
+}
+
+std::string PacketLossStats(const enet_uint32 mean, const enet_uint32 variance)
+{
+	// {:5.2} shows 5 digits with 2 after the decimal point, this is enough to represent a percentage
+	// with 2 digits for precision and does not change the text width
+	return fmt::format("{:5.2f} +/- {:5.2f} %", PacketLossNormalize(mean), PacketLossNormalize(variance));
+}
+
+std::string FormatRTT(const enet_uint32 time, const enet_uint32 variance)
+{
+	// Use `{:4}` so the "+/-" of the package loss and the rtt is aligned.
+	return fmt::format("{} +/- {:4} ms", time, variance);
+}
+}
+
 enum
 {
 	Row_InData,
@@ -30,8 +55,8 @@
 	Row_NextTimeout,
 	Row_PacketsSent,
 	Row_PacketsLost,
-	Row_LastRTT,
 	Row_RTT,
+	Row_LastRTT,
 	Row_MTU,
 	Row_ReliableInTransit,
 	NumberRows
@@ -71,13 +96,13 @@
 	m_ColumnDescriptions.push_back(ProfileColumn("Name", 200));
 
 	if (m_Peer)
-		m_ColumnDescriptions.push_back(ProfileColumn("Value", 80));
+		m_ColumnDescriptions.push_back(ProfileColumn("Value", 108));
 	else
 	{
 		std::lock_guard<std::mutex> lock(m_Mutex);
 
 		for (size_t i = 0; i < m_LatchedData.size(); ++i)
-			m_ColumnDescriptions.push_back(ProfileColumn("Peer "+CStr::FromUInt(i), 80));
+			m_ColumnDescriptions.push_back(ProfileColumn("Peer "+CStr::FromUInt(i), 108));
 	}
 
 	return m_ColumnDescriptions;
@@ -106,9 +131,23 @@
 	ROW(Row_LastRecvTime, "last receive time", lastReceiveTime);
 	ROW(Row_NextTimeout, "next timeout", nextTimeout);
 	ROW(Row_PacketsSent, "packets sent", packetsSent);
-	ROW(Row_PacketsLost, "packets lost", packetsLost);
-	ROW(Row_LastRTT, "last RTT", lastRoundTripTime);
-	ROW(Row_RTT, "mean RTT", roundTripTime);
+	case Row_PacketsLost:
+		if (col == 0) return "packet lost";
+
+		if (m_Peer) return PacketLossStats(m_Peer->packetLoss, m_Peer->packetLossVariance);
+		return "???";
+	case Row_RTT:
+		if (col == 0) return "mean RTT";
+
+		if (m_Peer) return FormatRTT(m_Peer->roundTripTime, m_Peer->roundTripTimeVariance);
+
+		return "???";
+	case Row_LastRTT:
+		if (col == 0) return "last RTT";
+
+		if (m_Peer) return FormatRTT(m_Peer->lastRoundTripTime, m_Peer->lastRoundTripTimeVariance);
+
+		return "???";
 	ROW(Row_MTU, "MTU", mtu);
 	ROW(Row_ReliableInTransit, "reliable data in transit", reliableDataInTransit);
 
@@ -142,9 +181,13 @@
 		ROW(Row_LastRecvTime, "last receive time", lastReceiveTime);
 		ROW(Row_NextTimeout, "next timeout", nextTimeout);
 		ROW(Row_PacketsSent, "packets sent", packetsSent);
-		ROW(Row_PacketsLost, "packets lost", packetsLost);
-		ROW(Row_LastRTT, "last RTT", lastRoundTripTime);
-		ROW(Row_RTT, "mean RTT", roundTripTime);
+
+		m_LatchedData[i].push_back(PacketLossStats(host->peers[i].packetLoss, host->peers[i].packetLossVariance));
+		// RTT stats
+		m_LatchedData[i].push_back(
+			FormatRTT(host->peers[i].roundTripTime, host->peers[i].roundTripTimeVariance));
+		m_LatchedData[i].push_back(
+			FormatRTT(host->peers[i].lastRoundTripTime, host->peers[i].lastRoundTripTimeVariance));
 		ROW(Row_MTU, "MTU", mtu);
 		ROW(Row_ReliableInTransit, "reliable data in transit", reliableDataInTransit);
 	}