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56 lines
2.7 KiB
Diff
56 lines
2.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <spottedleaf@spottedleaf.dev>
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Date: Tue, 22 Sep 2020 01:49:19 -0700
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Subject: [PATCH] Optimise non-flush packet sending
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Places like entity tracking make heavy use of packet sending,
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and internally netty will use some very expensive thread wakeup
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calls when scheduling.
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Thanks to various hacks in ProtocolLib as well as other
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plugins, we cannot simply use a queue of packets to group
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send on execute. We have to call execute for each packet.
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Tux's suggestion here is exactly what was needed - tag
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the Runnable indicating it should not make a wakeup call.
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Big thanks to Tux for making this possible as I had given
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up on this optimisation before he came along.
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Locally this patch drops the entity tracker tick by a full 1.5x.
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diff --git a/src/main/java/net/minecraft/network/Connection.java b/src/main/java/net/minecraft/network/Connection.java
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index 51217798bfd549483ce456b44d14089f35642c55..fefda9868fd3c4b3392b2bf4c68c0b4b2f311f31 100644
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--- a/src/main/java/net/minecraft/network/Connection.java
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+++ b/src/main/java/net/minecraft/network/Connection.java
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@@ -46,6 +46,8 @@ import org.slf4j.Logger;
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import org.slf4j.Marker;
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import org.slf4j.MarkerFactory;
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+
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+import io.netty.util.concurrent.AbstractEventExecutor; // Paper
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public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
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private static final float AVERAGE_PACKETS_SMOOTHING = 0.75F;
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@@ -396,9 +398,19 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
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if (this.channel.eventLoop().inEventLoop()) {
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this.doSendPacket(packet, callbacks, enumprotocol, enumprotocol1, flush); // Paper
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} else {
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+ // Paper start - optimise packets that are not flushed
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+ // note: since the type is not dynamic here, we need to actually copy the old executor code
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+ // into two branches. On conflict, just re-copy - no changes were made inside the executor code.
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+ if (!flush) {
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+ AbstractEventExecutor.LazyRunnable run = () -> {
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+ this.doSendPacket(packet, callbacks, enumprotocol, enumprotocol1, flush); // Paper - add flush parameter
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+ };
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+ this.channel.eventLoop().execute(run);
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+ } else { // Paper end - optimise packets that are not flushed
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this.channel.eventLoop().execute(() -> {
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- this.doSendPacket(packet, callbacks, enumprotocol, enumprotocol1, flush); // Paper
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+ this.doSendPacket(packet, callbacks, enumprotocol, enumprotocol1, flush); // Paper - add flush parameter // Paper - diff on change
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});
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+ } // Paper
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}
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}
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