From 19426387d4b1bb3b96094cdab97452c2e248f47d Mon Sep 17 00:00:00 2001
From: sfan5 <sfan5@live.de>
Date: Wed, 7 Aug 2019 10:31:12 +0200
Subject: [PATCH] Optimize usage of TOSERVER_GOTBLOCKS packet

---
 src/client/client.cpp | 26 +++++++++++++++++---------
 src/client/client.h   |  2 +-
 2 files changed, 18 insertions(+), 10 deletions(-)

diff --git a/src/client/client.cpp b/src/client/client.cpp
index 78e077fc3..4dc05dc09 100644
--- a/src/client/client.cpp
+++ b/src/client/client.cpp
@@ -475,6 +475,7 @@ void Client::step(float dtime)
 	*/
 	{
 		int num_processed_meshes = 0;
+		std::vector<v3s16> blocks_to_ack;
 		while (!m_mesh_update_thread.m_queue_out.empty())
 		{
 			num_processed_meshes++;
@@ -513,14 +514,18 @@ void Client::step(float dtime)
 				m_minimap->addBlock(r.p, minimap_mapblock);
 
 			if (r.ack_block_to_server) {
-				/*
-					Acknowledge block
-					[0] u8 count
-					[1] v3s16 pos_0
-				*/
-				sendGotBlocks(r.p);
+				if (blocks_to_ack.size() == 255) {
+					sendGotBlocks(blocks_to_ack);
+					blocks_to_ack.clear();
+				}
+
+				blocks_to_ack.emplace_back(r.p);
 			}
 		}
+		if (blocks_to_ack.size() > 0) {
+				// Acknowledge block(s)
+				sendGotBlocks(blocks_to_ack);
+		}
 
 		if (num_processed_meshes > 0)
 			g_profiler->graphAdd("num_processed_meshes", num_processed_meshes);
@@ -1069,10 +1074,13 @@ void Client::sendDeletedBlocks(std::vector<v3s16> &blocks)
 	Send(&pkt);
 }
 
-void Client::sendGotBlocks(v3s16 block)
+void Client::sendGotBlocks(const std::vector<v3s16> &blocks)
 {
-	NetworkPacket pkt(TOSERVER_GOTBLOCKS, 1 + 6);
-	pkt << (u8) 1 << block;
+	NetworkPacket pkt(TOSERVER_GOTBLOCKS, 1 + 6 * blocks.size());
+	pkt << (u8) blocks.size();
+	for (const v3s16 &block : blocks)
+		pkt << block;
+
 	Send(&pkt);
 }
 
diff --git a/src/client/client.h b/src/client/client.h
index 312b8c87f..527ae6524 100644
--- a/src/client/client.h
+++ b/src/client/client.h
@@ -465,7 +465,7 @@ private:
 	void promptConfirmRegistration(AuthMechanism chosen_auth_mechanism);
 	void startAuth(AuthMechanism chosen_auth_mechanism);
 	void sendDeletedBlocks(std::vector<v3s16> &blocks);
-	void sendGotBlocks(v3s16 block);
+	void sendGotBlocks(const std::vector<v3s16> &blocks);
 	void sendRemovedSounds(std::vector<s32> &soundList);
 
 	// Helper function