Parallel and caching

- NEEDS MORE TESTING
 - Tick and update instances in parallel
 - Mixin to cache chunk lookups

src/main/java/com/jozufozu/flywheel/backend/instancing/InstanceManager.java

@@ -55,10 +55,11 @@ public abstract class InstanceManager<T> implements MaterialManager.OriginShiftL
 		int cZ = (int) cameraZ;
 
 		if (tickableInstances.size() > 0) {
-			for (ITickableInstance instance : tickableInstances.values()) {
+			tickableInstances.object2ObjectEntrySet().parallelStream().forEach(e -> {
+				ITickableInstance instance = e.getValue();
 				if (!instance.decreaseTickRateWithDistance()) {
 					instance.tick();
-					continue;
+					return;
 				}
 
 				BlockPos pos = instance.getWorldPosition();
@@ -68,7 +69,7 @@ public abstract class InstanceManager<T> implements MaterialManager.OriginShiftL
 				int dZ = pos.getZ() - cZ;
 
 				if ((tick % getUpdateDivisor(dX, dY, dZ)) == 0) instance.tick();
-			}
+			});
 		}
 
 		queuedUpdates.forEach(te -> {
@@ -94,7 +95,8 @@ public abstract class InstanceManager<T> implements MaterialManager.OriginShiftL
 
 		if (dynamicInstances.size() > 0) {
 			dynamicInstances.object2ObjectEntrySet()
-					.fastForEach(e -> {
+					.parallelStream()
+					.forEach(e -> {
 						IDynamicInstance dyn = e.getValue();
 						if (!dyn.decreaseFramerateWithDistance() || shouldFrameUpdate(dyn.getWorldPosition(), lookX, lookY, lookZ, cX, cY, cZ))
 							dyn.beginFrame();

src/main/java/com/jozufozu/flywheel/backend/instancing/Instancer.java

@@ -74,7 +74,10 @@ public class Instancer<D extends InstanceData> {
 		D instanceData = factory.create(this);
 		instanceData.dirty = true;
 		anyToUpdate = true;
-		data.add(instanceData);
+
+		synchronized (data) {
+			data.add(instanceData);
+		}
 
 		return instanceData;
 	}

src/main/java/com/jozufozu/flywheel/mixin/FastChunkProviderMixin.java

@@ -0,0 +1,68 @@
+package com.jozufozu.flywheel.mixin;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.Redirect;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+import net.minecraft.client.multiplayer.ClientChunkProvider;
+import net.minecraft.nbt.CompoundNBT;
+import net.minecraft.network.PacketBuffer;
+import net.minecraft.world.biome.BiomeContainer;
+import net.minecraft.world.chunk.AbstractChunkProvider;
+import net.minecraft.world.chunk.Chunk;
+import net.minecraft.world.chunk.ChunkStatus;
+import net.minecraft.world.chunk.IChunk;
+
+@Mixin(ClientChunkProvider.class)
+public abstract class FastChunkProviderMixin extends AbstractChunkProvider {
+
+	@Unique
+	private int lastX;
+	@Unique
+	private int lastZ;
+
+	@Unique
+	private IChunk lastChunk;
+
+	@Inject(method = "getChunk",
+			at = @At("HEAD"),
+			cancellable = true)
+	public void returnCachedChunk(int x, int z, ChunkStatus status, boolean create, CallbackInfoReturnable<IChunk> cir) {
+		if (status.isOrAfter(ChunkStatus.FULL) && lastChunk != null && x == lastX && z == lastZ) {
+			cir.setReturnValue(lastChunk);
+		}
+	}
+
+	@Inject(method = "getChunk",
+			at = @At("RETURN"))
+	public void cacheChunk(int x, int z, ChunkStatus status, boolean create, CallbackInfoReturnable<IChunk> cir) {
+		if (status.isOrAfter(ChunkStatus.FULL)) {
+			lastChunk = cir.getReturnValue();
+			lastX = x;
+			lastZ = z;
+		}
+	}
+
+	@Inject(method = "drop", at = @At("HEAD"))
+	public void invalidateOnDrop(int x, int z, CallbackInfo ci) {
+		if (x == lastX && z == lastZ)
+			lastChunk = null;
+	}
+
+	@Inject(method = "replaceWithPacketData", at = @At("HEAD"))
+	public void invalidateOnPacket(int x, int z, BiomeContainer p_228313_3_, PacketBuffer p_228313_4_, CompoundNBT p_228313_5_, int p_228313_6_, boolean p_228313_7_, CallbackInfoReturnable<Chunk> cir) {
+		if (x == lastX && z == lastZ)
+			lastChunk = null;
+	}
+
+	@Redirect(method = "isTickingChunk", at = @At(value = "INVOKE", target = "Lnet/minecraft/client/multiplayer/ClientChunkProvider;hasChunk(II)Z"))
+	public boolean redirectTicking(ClientChunkProvider clientChunkProvider, int x, int z) {
+		if (lastChunk != null && x == lastX && z == lastZ) return true;
+
+		return clientChunkProvider.hasChunk(x, z);
+	}
+}

src/main/java/com/jozufozu/flywheel/vanilla/VanillaInstances.java

@@ -13,6 +13,7 @@ import net.minecraft.tileentity.TileEntityType;
  * 		<tr><td>{@link TileEntityType#ENCHANTING_TABLE}</td><td> {@link net.minecraft.client.renderer.tileentity.EnchantmentTableTileEntityRenderer EnchantmentTableTileEntityRenderer}</td></tr>
  * 		<tr><td>{@link TileEntityType#LECTERN}</td><td> {@link net.minecraft.client.renderer.tileentity.LecternTileEntityRenderer LecternTileEntityRenderer}</td></tr>
  * 		<tr><td>{@link TileEntityType#MOB_SPAWNER}</td><td> {@link net.minecraft.client.renderer.tileentity.MobSpawnerTileEntityRenderer MobSpawnerTileEntityRenderer}</td></tr>
+ * 		<tr><td>{@link TileEntityType#BED}</td><td> {@link net.minecraft.client.renderer.tileentity.BedTileEntityRenderer BedTileEntityRenderer}</td></tr>
  * 		<tr><td>^^ Interesting - Major vv</td></tr>
  * 		<tr><td>{@link TileEntityType#END_PORTAL}</td><td> {@link net.minecraft.client.renderer.tileentity.EndPortalTileEntityRenderer EndPortalTileEntityRenderer}</td></tr>
  * 		<tr><td>{@link TileEntityType#END_GATEWAY}</td><td> {@link net.minecraft.client.renderer.tileentity.EndGatewayTileEntityRenderer EndGatewayTileEntityRenderer}</td></tr>
@@ -20,7 +21,6 @@ import net.minecraft.tileentity.TileEntityType;
  * 		<tr><td>{@link TileEntityType#SKULL}</td><td> {@link net.minecraft.client.renderer.tileentity.SkullTileEntityRenderer SkullTileEntityRenderer}</td></tr>
  * 		<tr><td>{@link TileEntityType#BANNER}</td><td> {@link net.minecraft.client.renderer.tileentity.BannerTileEntityRenderer BannerTileEntityRenderer}</td></tr>
  * 		<tr><td>{@link TileEntityType#STRUCTURE_BLOCK}</td><td> {@link net.minecraft.client.renderer.tileentity.StructureTileEntityRenderer StructureTileEntityRenderer}</td></tr>
- * 		<tr><td>{@link TileEntityType#BED}</td><td> {@link net.minecraft.client.renderer.tileentity.BedTileEntityRenderer BedTileEntityRenderer}</td></tr>
  * 		<tr><td>{@link TileEntityType#CAMPFIRE}</td><td> {@link net.minecraft.client.renderer.tileentity.CampfireTileEntityRenderer CampfireTileEntityRenderer}</td></tr>
  * </table>
  */

src/main/resources/flywheel.mixins.json

@@ -4,7 +4,6 @@
   "package": "com.jozufozu.flywheel.mixin",
   "compatibilityLevel": "JAVA_8",
   "refmap": "flywheel.refmap.json",
-  "mixins": [],
   "client": [
     "CancelEntityRenderMixin",
     "CancelTileEntityRenderMixin",
@@ -18,7 +17,8 @@
     "atlas.AtlasDataMixin",
     "atlas.SheetDataAccessor",
     "light.LightUpdateMixin",
-    "light.NetworkLightUpdateMixin"
+    "light.NetworkLightUpdateMixin",
+    "FastChunkProviderMixin"
   ],
   "injectors": {
     "defaultRequire": 0