aboutsummaryrefslogtreecommitdiffhomepage
path: root/patches/server/1016-Optimize-Hoppers.patch
blob: 6117a90b478e464eae626a7435b44d9f8eac8f71 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Wed, 27 Apr 2016 22:09:52 -0400
Subject: [PATCH] Optimize Hoppers

* Removes unnecessary extra calls to .update() that are very expensive
* Lots of itemstack cloning removed. Only clone if the item is actually moved
* Return true when a plugin cancels inventory move item event instead of false, as false causes pulls to cycle through all items.
  However, pushes do not exhibit the same behavior, so this is not something plugins could of been relying on.
* Add option (Default on) to cooldown hoppers when they fail to move an item due to full inventory
* Skip subsequent InventoryMoveItemEvents if a plugin does not use the item after first event fire for an iteration by tracking changes to the event via an internal event implementation.
* Don't check for Entities with Inventories if the block above us is also occluding (not just Inventoried)
* Remove Streams from Item Suck In and restore restore 1.12 AABB checks which is simpler and no voxel allocations (was doing TWO Item Suck ins)

diff --git a/src/main/java/io/papermc/paper/event/inventory/PaperInventoryMoveItemEvent.java b/src/main/java/io/papermc/paper/event/inventory/PaperInventoryMoveItemEvent.java
new file mode 100644
index 0000000000000000000000000000000000000000..5c42823726e70ce6c9d0121d074315488e8b3f60
--- /dev/null
+++ b/src/main/java/io/papermc/paper/event/inventory/PaperInventoryMoveItemEvent.java
@@ -0,0 +1,31 @@
+package io.papermc.paper.event.inventory;
+
+import org.bukkit.event.inventory.InventoryMoveItemEvent;
+import org.bukkit.inventory.Inventory;
+import org.bukkit.inventory.ItemStack;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.framework.qual.DefaultQualifier;
+import org.jetbrains.annotations.NotNull;
+
+@DefaultQualifier(NonNull.class)
+public class PaperInventoryMoveItemEvent extends InventoryMoveItemEvent {
+
+    public boolean calledSetItem;
+    public boolean calledGetItem;
+
+    public PaperInventoryMoveItemEvent(final @NotNull Inventory sourceInventory, final @NotNull ItemStack itemStack, final @NotNull Inventory destinationInventory, final boolean didSourceInitiate) {
+        super(sourceInventory, itemStack, destinationInventory, didSourceInitiate);
+    }
+
+    @Override
+    public ItemStack getItem() {
+        this.calledGetItem = true;
+        return super.getItem();
+    }
+
+    @Override
+    public void setItem(final ItemStack itemStack) {
+        super.setItem(itemStack);
+        this.calledSetItem = true;
+    }
+}
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 4f076eae3a9c597e41f4520dae8378ec429d9f69..810b6099e734a5524e696beb3f25d6ca686625ea 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -1753,6 +1753,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
             ServerLevel worldserver = (ServerLevel) iterator.next();
             worldserver.hasPhysicsEvent = org.bukkit.event.block.BlockPhysicsEvent.getHandlerList().getRegisteredListeners().length > 0; // Paper - BlockPhysicsEvent
             worldserver.hasEntityMoveEvent = io.papermc.paper.event.entity.EntityMoveEvent.getHandlerList().getRegisteredListeners().length > 0; // Paper - Add EntityMoveEvent
+            net.minecraft.world.level.block.entity.HopperBlockEntity.skipHopperEvents = worldserver.paperConfig().hopper.disableMoveEvent || org.bukkit.event.inventory.InventoryMoveItemEvent.getHandlerList().getRegisteredListeners().length == 0; // Paper - Perf: Optimize Hoppers
 
             this.profiler.push(() -> {
                 String s = String.valueOf(worldserver);
diff --git a/src/main/java/net/minecraft/world/item/ItemStack.java b/src/main/java/net/minecraft/world/item/ItemStack.java
index 3e9caee7322d7ffdb93fd7d063675dddc4c71226..8e2b3dd109dca3089cbce82cd3788874613a3230 100644
--- a/src/main/java/net/minecraft/world/item/ItemStack.java
+++ b/src/main/java/net/minecraft/world/item/ItemStack.java
@@ -794,10 +794,16 @@ public final class ItemStack implements DataComponentHolder {
     }
 
     public ItemStack copy() {
-        if (this.isEmpty()) {
+        // Paper start - Perf: Optimize Hoppers
+        return this.copy(false);
+    }
+
+    public ItemStack copy(boolean originalItem) {
+        if (!originalItem && this.isEmpty()) {
+            // Paper end - Perf: Optimize Hoppers
             return ItemStack.EMPTY;
         } else {
-            ItemStack itemstack = new ItemStack(this.getItem(), this.count, this.components.copy());
+            ItemStack itemstack = new ItemStack(originalItem ? this.item : this.getItem(), this.count, this.components.copy()); // Paper - Perf: Optimize Hoppers
 
             itemstack.setPopTime(this.getPopTime());
             return itemstack;
diff --git a/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
index d2939e12449ae6b2b57beff7e689a0d39212161d..65170cbb50d8d5030fc5e33b6389c554aec6ae31 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
@@ -38,6 +38,7 @@ import co.aikar.timings.MinecraftTimings; // Paper
 import co.aikar.timings.Timing; // Paper
 
 public abstract class BlockEntity {
+    static boolean ignoreTileUpdates; // Paper - Perf: Optimize Hoppers
 
     public Timing tickTimer = MinecraftTimings.getTileEntityTimings(this); // Paper
     // CraftBukkit start - data containers
@@ -211,6 +212,7 @@ public abstract class BlockEntity {
 
     public void setChanged() {
         if (this.level != null) {
+            if (ignoreTileUpdates) return; // Paper - Perf: Optimize Hoppers
             BlockEntity.setChanged(this.level, this.worldPosition, this.blockState);
         }
 
diff --git a/src/main/java/net/minecraft/world/level/block/entity/HopperBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/HopperBlockEntity.java
index 92086ca118d55ec49cefa5bf18977f8706e3e4b4..8310d132006043e93c612890514c4c7f3eb1c74d 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/HopperBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/HopperBlockEntity.java
@@ -156,6 +156,43 @@ public class HopperBlockEntity extends RandomizableContainerBlockEntity implemen
 
     }
 
+    // Paper start - Perf: Optimize Hoppers
+    private static final int HOPPER_EMPTY = 0;
+    private static final int HOPPER_HAS_ITEMS = 1;
+    private static final int HOPPER_IS_FULL = 2;
+
+    private static int getFullState(final HopperBlockEntity tileEntity) {
+        tileEntity.unpackLootTable(null);
+
+        final List<ItemStack> hopperItems = tileEntity.getItems();
+
+        boolean empty = true;
+        boolean full = true;
+
+        for (int i = 0, len = hopperItems.size(); i < len; ++i) {
+            final ItemStack stack = hopperItems.get(i);
+            if (stack.isEmpty()) {
+                full = false;
+                continue;
+            }
+
+            if (!full) {
+                // can't be full
+                return HOPPER_HAS_ITEMS;
+            }
+
+            empty = false;
+
+            if (stack.getCount() != stack.getMaxStackSize()) {
+                // can't be full or empty
+                return HOPPER_HAS_ITEMS;
+            }
+        }
+
+        return empty ? HOPPER_EMPTY : (full ? HOPPER_IS_FULL : HOPPER_HAS_ITEMS);
+    }
+    // Paper end - Perf: Optimize Hoppers
+
     private static boolean tryMoveItems(Level world, BlockPos pos, BlockState state, HopperBlockEntity blockEntity, BooleanSupplier booleansupplier) {
         if (world.isClientSide) {
             return false;
@@ -163,11 +200,12 @@ public class HopperBlockEntity extends RandomizableContainerBlockEntity implemen
             if (!blockEntity.isOnCooldown() && (Boolean) state.getValue(HopperBlock.ENABLED)) {
                 boolean flag = false;
 
-                if (!blockEntity.isEmpty()) {
+                final int fullState = getFullState(blockEntity); // Paper - Perf: Optimize Hoppers
+                if (fullState != HOPPER_EMPTY) { // Paper - Perf: Optimize Hoppers
                     flag = HopperBlockEntity.ejectItems(world, pos, blockEntity);
                 }
 
-                if (!blockEntity.inventoryFull()) {
+                if (fullState != HOPPER_IS_FULL || flag) { // Paper - Perf: Optimize Hoppers
                     flag |= booleansupplier.getAsBoolean();
                 }
 
@@ -198,6 +236,202 @@ public class HopperBlockEntity extends RandomizableContainerBlockEntity implemen
         return false;
     }
 
+    // Paper start - Perf: Optimize Hoppers
+    private static boolean skipPullModeEventFire;
+    private static boolean skipPushModeEventFire;
+    public static boolean skipHopperEvents;
+
+    private static boolean hopperPush(final Level level, final Container destination, final Direction direction, final HopperBlockEntity hopper) {
+        skipPushModeEventFire = skipHopperEvents;
+        boolean foundItem = false;
+        for (int i = 0; i < hopper.getContainerSize(); ++i) {
+            final ItemStack item = hopper.getItem(i);
+            if (!item.isEmpty()) {
+                foundItem = true;
+                ItemStack origItemStack = item;
+                ItemStack movedItem = origItemStack;
+
+                final int originalItemCount = origItemStack.getCount();
+                final int movedItemCount = Math.min(level.spigotConfig.hopperAmount, originalItemCount);
+                origItemStack.setCount(movedItemCount);
+
+                // We only need to fire the event once to give protection plugins a chance to cancel this event
+                // Because nothing uses getItem, every event call should end up the same result.
+                if (!skipPushModeEventFire) {
+                    movedItem = callPushMoveEvent(destination, movedItem, hopper);
+                    if (movedItem == null) { // cancelled
+                        origItemStack.setCount(originalItemCount);
+                        return false;
+                    }
+                }
+
+                final ItemStack remainingItem = addItem(hopper, destination, movedItem, direction);
+                final int remainingItemCount = remainingItem.getCount();
+                if (remainingItemCount != movedItemCount) {
+                    origItemStack = origItemStack.copy(true);
+                    origItemStack.setCount(originalItemCount);
+                    if (!origItemStack.isEmpty()) {
+                        origItemStack.setCount(originalItemCount - movedItemCount + remainingItemCount);
+                    }
+                    hopper.setItem(i, origItemStack);
+                    destination.setChanged();
+                    return true;
+                }
+                origItemStack.setCount(originalItemCount);
+            }
+        }
+        if (foundItem && level.paperConfig().hopper.cooldownWhenFull) { // Inventory was full - cooldown
+            hopper.setCooldown(level.spigotConfig.hopperTransfer);
+        }
+        return false;
+    }
+
+    private static boolean hopperPull(final Level level, final Hopper hopper, final Container container, ItemStack origItemStack, final int i) {
+        ItemStack movedItem = origItemStack;
+        final int originalItemCount = origItemStack.getCount();
+        final int movedItemCount = Math.min(level.spigotConfig.hopperAmount, originalItemCount);
+        container.setChanged(); // original logic always marks source inv as changed even if no move happens.
+        movedItem.setCount(movedItemCount);
+
+        if (!skipPullModeEventFire) {
+            movedItem = callPullMoveEvent(hopper, container, movedItem);
+            if (movedItem == null) { // cancelled
+                origItemStack.setCount(originalItemCount);
+                // Drastically improve performance by returning true.
+                // No plugin could of relied on the behavior of false as the other call
+                // site for IMIE did not exhibit the same behavior
+                return true;
+            }
+        }
+
+        final ItemStack remainingItem = addItem(container, hopper, movedItem, null);
+        final int remainingItemCount = remainingItem.getCount();
+        if (remainingItemCount != movedItemCount) {
+            origItemStack = origItemStack.copy(true);
+            origItemStack.setCount(originalItemCount);
+            if (!origItemStack.isEmpty()) {
+                origItemStack.setCount(originalItemCount - movedItemCount + remainingItemCount);
+            }
+
+            ignoreTileUpdates = true;
+            container.setItem(i, origItemStack);
+            ignoreTileUpdates = false;
+            container.setChanged();
+            return true;
+        }
+        origItemStack.setCount(originalItemCount);
+
+        if (level.paperConfig().hopper.cooldownWhenFull) {
+            cooldownHopper(hopper);
+        }
+
+        return false;
+    }
+
+    @Nullable
+    private static ItemStack callPushMoveEvent(Container iinventory, ItemStack itemstack, HopperBlockEntity hopper) {
+        final Inventory destinationInventory = getInventory(iinventory);
+        final io.papermc.paper.event.inventory.PaperInventoryMoveItemEvent event = new io.papermc.paper.event.inventory.PaperInventoryMoveItemEvent(hopper.getOwner(false).getInventory(),
+            CraftItemStack.asCraftMirror(itemstack), destinationInventory, true);
+        final boolean result = event.callEvent();
+        if (!event.calledGetItem && !event.calledSetItem) {
+            skipPushModeEventFire = true;
+        }
+        if (!result) {
+            cooldownHopper(hopper);
+            return null;
+        }
+
+        if (event.calledSetItem) {
+            return CraftItemStack.asNMSCopy(event.getItem());
+        } else {
+            return itemstack;
+        }
+    }
+
+    @Nullable
+    private static ItemStack callPullMoveEvent(final Hopper hopper, final Container container, final ItemStack itemstack) {
+        final Inventory sourceInventory = getInventory(container);
+        final Inventory destination = getInventory(hopper);
+
+        // Mirror is safe as no plugins ever use this item
+        final io.papermc.paper.event.inventory.PaperInventoryMoveItemEvent event = new io.papermc.paper.event.inventory.PaperInventoryMoveItemEvent(sourceInventory, CraftItemStack.asCraftMirror(itemstack), destination, false);
+        final boolean result = event.callEvent();
+        if (!event.calledGetItem && !event.calledSetItem) {
+            skipPullModeEventFire = true;
+        }
+        if (!result) {
+            cooldownHopper(hopper);
+            return null;
+        }
+
+        if (event.calledSetItem) {
+            return CraftItemStack.asNMSCopy(event.getItem());
+        } else {
+            return itemstack;
+        }
+    }
+
+    private static Inventory getInventory(final Container container) {
+        final Inventory sourceInventory;
+        if (container instanceof CompoundContainer compoundContainer) {
+            // Have to special-case large chests as they work oddly
+            sourceInventory = new org.bukkit.craftbukkit.inventory.CraftInventoryDoubleChest(compoundContainer);
+        } else if (container instanceof BlockEntity blockEntity) {
+            sourceInventory = blockEntity.getOwner(false).getInventory();
+        } else if (container.getOwner() != null) {
+            sourceInventory = container.getOwner().getInventory();
+        } else {
+            sourceInventory = new CraftInventory(container);
+        }
+        return sourceInventory;
+    }
+
+    private static void cooldownHopper(final Hopper hopper) {
+        if (hopper instanceof HopperBlockEntity blockEntity && blockEntity.getLevel() != null) {
+            blockEntity.setCooldown(blockEntity.getLevel().spigotConfig.hopperTransfer);
+        }
+    }
+
+    private static boolean allMatch(Container iinventory, Direction enumdirection, java.util.function.BiPredicate<ItemStack, Integer> test) {
+        if (iinventory instanceof WorldlyContainer) {
+            for (int i : ((WorldlyContainer) iinventory).getSlotsForFace(enumdirection)) {
+                if (!test.test(iinventory.getItem(i), i)) {
+                    return false;
+                }
+            }
+        } else {
+            int size = iinventory.getContainerSize();
+            for (int i = 0; i < size; i++) {
+                if (!test.test(iinventory.getItem(i), i)) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+
+    private static boolean anyMatch(Container iinventory, Direction enumdirection, java.util.function.BiPredicate<ItemStack, Integer> test) {
+        if (iinventory instanceof WorldlyContainer) {
+            for (int i : ((WorldlyContainer) iinventory).getSlotsForFace(enumdirection)) {
+                if (test.test(iinventory.getItem(i), i)) {
+                    return true;
+                }
+            }
+        } else {
+            int size = iinventory.getContainerSize();
+            for (int i = 0; i < size; i++) {
+                if (test.test(iinventory.getItem(i), i)) {
+                    return true;
+                }
+            }
+        }
+        return true;
+    }
+    private static final java.util.function.BiPredicate<ItemStack, Integer> STACK_SIZE_TEST = (itemstack, i) -> itemstack.getCount() >= itemstack.getMaxStackSize();
+    private static final java.util.function.BiPredicate<ItemStack, Integer> IS_EMPTY_TEST = (itemstack, i) -> itemstack.isEmpty();
+    // Paper end - Perf: Optimize Hoppers
+
     private static boolean ejectItems(Level world, BlockPos pos, HopperBlockEntity blockEntity) {
         Container iinventory = HopperBlockEntity.getAttachedContainer(world, pos, blockEntity);
 
@@ -209,47 +443,50 @@ public class HopperBlockEntity extends RandomizableContainerBlockEntity implemen
             if (HopperBlockEntity.isFullContainer(iinventory, enumdirection)) {
                 return false;
             } else {
-                for (int i = 0; i < blockEntity.getContainerSize(); ++i) {
-                    ItemStack itemstack = blockEntity.getItem(i);
-
-                    if (!itemstack.isEmpty()) {
-                        int j = itemstack.getCount();
-                        // CraftBukkit start - Call event when pushing items into other inventories
-                        CraftItemStack oitemstack = CraftItemStack.asCraftMirror(blockEntity.removeItem(i, world.spigotConfig.hopperAmount)); // Spigot
-
-                        Inventory destinationInventory;
-                        // Have to special case large chests as they work oddly
-                        if (iinventory instanceof CompoundContainer) {
-                            destinationInventory = new org.bukkit.craftbukkit.inventory.CraftInventoryDoubleChest((CompoundContainer) iinventory);
-                        } else if (iinventory.getOwner() != null) {
-                            destinationInventory = iinventory.getOwner().getInventory();
-                        } else {
-                            destinationInventory = new CraftInventory(iinventory);
-                        }
-
-                        InventoryMoveItemEvent event = new InventoryMoveItemEvent(blockEntity.getOwner().getInventory(), oitemstack, destinationInventory, true);
-                        world.getCraftServer().getPluginManager().callEvent(event);
-                        if (event.isCancelled()) {
-                            blockEntity.setItem(i, itemstack);
-                            blockEntity.setCooldown(world.spigotConfig.hopperTransfer); // Delay hopper checks // Spigot
-                            return false;
-                        }
-                        ItemStack itemstack1 = HopperBlockEntity.addItem(blockEntity, iinventory, CraftItemStack.asNMSCopy(event.getItem()), enumdirection);
-                        // CraftBukkit end
-
-                        if (itemstack1.isEmpty()) {
-                            iinventory.setChanged();
-                            return true;
-                        }
-
-                        itemstack.setCount(j);
-                        if (j == 1) {
-                            blockEntity.setItem(i, itemstack);
-                        }
-                    }
-                }
-
-                return false;
+                // Paper start - Perf: Optimize Hoppers
+                return hopperPush(world, iinventory, enumdirection, blockEntity);
+                //for (int i = 0; i < blockEntity.getContainerSize(); ++i) {
+                //    ItemStack itemstack = blockEntity.getItem(i);
+
+                //    if (!itemstack.isEmpty()) {
+                //        int j = itemstack.getCount();
+                //        // CraftBukkit start - Call event when pushing items into other inventories
+                //        CraftItemStack oitemstack = CraftItemStack.asCraftMirror(blockEntity.removeItem(i, world.spigotConfig.hopperAmount)); // Spigot
+
+                //        Inventory destinationInventory;
+                //        // Have to special case large chests as they work oddly
+                //        if (iinventory instanceof CompoundContainer) {
+                //            destinationInventory = new org.bukkit.craftbukkit.inventory.CraftInventoryDoubleChest((CompoundContainer) iinventory);
+                //        } else if (iinventory.getOwner() != null) {
+                //            destinationInventory = iinventory.getOwner().getInventory();
+                //        } else {
+                //            destinationInventory = new CraftInventory(iinventory);
+                //        }
+
+                //        InventoryMoveItemEvent event = new InventoryMoveItemEvent(tileentityhopper.getOwner().getInventory(), oitemstack, destinationInventory, true);
+                //        world.getCraftServer().getPluginManager().callEvent(event);
+                //        if (event.isCancelled()) {
+                //            blockEntity.setItem(i, itemstack);
+                //            blockEntity.setCooldown(world.spigotConfig.hopperTransfer); // Delay hopper checks // Spigot
+                //            return false;
+                //        }
+                //        ItemStack itemstack1 = HopperBlockEntity.addItem(blockEntity, iinventory, CraftItemStack.asNMSCopy(event.getItem()), enumdirection);
+                //        // CraftBukkit end
+
+                //        if (itemstack1.isEmpty()) {
+                //            iinventory.setChanged();
+                //            return true;
+                //        }
+
+                //        itemstack.setCount(j);
+                //        if (j == 1) {
+                //            blockEntity.setItem(i, itemstack);
+                //        }
+                //    }
+                //}
+
+                // return false;
+                // Paper end - Perf: Optimize Hoppers
             }
         }
     }
@@ -300,7 +537,6 @@ public class HopperBlockEntity extends RandomizableContainerBlockEntity implemen
                 return false;
             }
         }
-
         return true;
     }
 
@@ -311,6 +547,7 @@ public class HopperBlockEntity extends RandomizableContainerBlockEntity implemen
 
         if (iinventory != null) {
             Direction enumdirection = Direction.DOWN;
+            skipPullModeEventFire = skipHopperEvents; // Paper - Perf: Optimize Hoppers
             int[] aint = HopperBlockEntity.getSlots(iinventory, enumdirection);
             int i = aint.length;
 
@@ -346,44 +583,47 @@ public class HopperBlockEntity extends RandomizableContainerBlockEntity implemen
         ItemStack itemstack = iinventory.getItem(i);
 
         if (!itemstack.isEmpty() && HopperBlockEntity.canTakeItemFromContainer(ihopper, iinventory, itemstack, i, enumdirection)) {
-            int j = itemstack.getCount();
-            // CraftBukkit start - Call event on collection of items from inventories into the hopper
-            CraftItemStack oitemstack = CraftItemStack.asCraftMirror(iinventory.removeItem(i, world.spigotConfig.hopperAmount)); // Spigot
-
-            Inventory sourceInventory;
-            // Have to special case large chests as they work oddly
-            if (iinventory instanceof CompoundContainer) {
-                sourceInventory = new org.bukkit.craftbukkit.inventory.CraftInventoryDoubleChest((CompoundContainer) iinventory);
-            } else if (iinventory.getOwner() != null) {
-                sourceInventory = iinventory.getOwner().getInventory();
-            } else {
-                sourceInventory = new CraftInventory(iinventory);
-            }
-
-            InventoryMoveItemEvent event = new InventoryMoveItemEvent(sourceInventory, oitemstack, ihopper.getOwner().getInventory(), false);
-
-            Bukkit.getServer().getPluginManager().callEvent(event);
-            if (event.isCancelled()) {
-                iinventory.setItem(i, itemstack);
-
-                if (ihopper instanceof HopperBlockEntity) {
-                    ((HopperBlockEntity) ihopper).setCooldown(world.spigotConfig.hopperTransfer); // Spigot
-                }
-
-                return false;
-            }
-            ItemStack itemstack1 = HopperBlockEntity.addItem(iinventory, ihopper, CraftItemStack.asNMSCopy(event.getItem()), null);
-            // CraftBukkit end
-
-            if (itemstack1.isEmpty()) {
-                iinventory.setChanged();
-                return true;
-            }
-
-            itemstack.setCount(j);
-            if (j == 1) {
-                iinventory.setItem(i, itemstack);
-            }
+            // Paper start - Perf: Optimize Hoppers
+            return hopperPull(world, ihopper, iinventory, itemstack, i);
+        //    int j = itemstack.getCount();
+        //    // CraftBukkit start - Call event on collection of items from inventories into the hopper
+        //    CraftItemStack oitemstack = CraftItemStack.asCraftMirror(iinventory.removeItem(i, world.spigotConfig.hopperAmount)); // Spigot
+
+        //    Inventory sourceInventory;
+        //    // Have to special case large chests as they work oddly
+        //    if (iinventory instanceof CompoundContainer) {
+        //        sourceInventory = new org.bukkit.craftbukkit.inventory.CraftInventoryDoubleChest((CompoundContainer) iinventory);
+        //    } else if (iinventory.getOwner() != null) {
+        //        sourceInventory = iinventory.getOwner().getInventory();
+        //    } else {
+        //        sourceInventory = new CraftInventory(iinventory);
+        //    }
+
+        //    InventoryMoveItemEvent event = new InventoryMoveItemEvent(sourceInventory, oitemstack, ihopper.getOwner().getInventory(), false);
+
+        //    Bukkit.getServer().getPluginManager().callEvent(event);
+        //    if (event.isCancelled()) {
+        //        iinventory.setItem(i, itemstack);
+
+        //        if (ihopper instanceof HopperBlockEntity) {
+        //            ((HopperBlockEntity) ihopper).setCooldown(world.spigotConfig.hopperTransfer); // Spigot
+        //        }
+
+        //        return false;
+        //    }
+        //    ItemStack itemstack1 = HopperBlockEntity.addItem(iinventory, ihopper, CraftItemStack.asNMSCopy(event.getItem()), null);
+        //    // CraftBukkit end
+
+        //    if (itemstack1.isEmpty()) {
+        //        iinventory.setChanged();
+        //        return true;
+        //    }
+
+        //    itemstack.setCount(j);
+        //    if (j == 1) {
+        //        iinventory.setItem(i, itemstack);
+        //    }
+            // Paper end - Perf: Optimize Hoppers
         }
 
         return false;
@@ -392,12 +632,14 @@ public class HopperBlockEntity extends RandomizableContainerBlockEntity implemen
     public static boolean addItem(Container inventory, ItemEntity itemEntity) {
         boolean flag = false;
         // CraftBukkit start
-        InventoryPickupItemEvent event = new InventoryPickupItemEvent(inventory.getOwner().getInventory(), (org.bukkit.entity.Item) itemEntity.getBukkitEntity());
+        if (InventoryPickupItemEvent.getHandlerList().getRegisteredListeners().length > 0) { // Paper - optimize hoppers
+        InventoryPickupItemEvent event = new InventoryPickupItemEvent(getInventory(inventory), (org.bukkit.entity.Item) itemEntity.getBukkitEntity()); // Paper - Perf: Optimize Hoppers; use getInventory() to avoid snapshot creation
         itemEntity.level().getCraftServer().getPluginManager().callEvent(event);
         if (event.isCancelled()) {
             return false;
         }
         // CraftBukkit end
+        } // Paper - Perf: Optimize Hoppers
         ItemStack itemstack = itemEntity.getItem().copy();
         ItemStack itemstack1 = HopperBlockEntity.addItem((Container) null, inventory, itemstack, (Direction) null);
 
@@ -491,7 +733,9 @@ public class HopperBlockEntity extends RandomizableContainerBlockEntity implemen
                     stack = stack.split(to.getMaxStackSize());
                 }
                 // Spigot end
+                ignoreTileUpdates = true; // Paper - Perf: Optimize Hoppers
                 to.setItem(slot, stack);
+                ignoreTileUpdates = false; // Paper - Perf: Optimize Hoppers
                 stack = leftover; // Paper - Make hoppers respect inventory max stack size
                 flag = true;
             } else if (HopperBlockEntity.canMergeItems(itemstack1, stack)) {
@@ -571,14 +815,20 @@ public class HopperBlockEntity extends RandomizableContainerBlockEntity implemen
 
     @Nullable
     public static Container getContainerAt(Level world, BlockPos pos) {
-        return HopperBlockEntity.getContainerAt(world, pos, world.getBlockState(pos), (double) pos.getX() + 0.5D, (double) pos.getY() + 0.5D, (double) pos.getZ() + 0.5D);
+        return HopperBlockEntity.getContainerAt(world, pos, world.getBlockState(pos), (double) pos.getX() + 0.5D, (double) pos.getY() + 0.5D, (double) pos.getZ() + 0.5D, true);
     }
 
     @Nullable
     private static Container getContainerAt(Level world, BlockPos pos, BlockState state, double x, double y, double z) {
+        // Paper start - Perf: Optimize Hoppers
+        return HopperBlockEntity.getContainerAt(world, pos, state, x, y, z, false);
+    }
+    @Nullable
+    private static Container getContainerAt(Level world, BlockPos pos, BlockState state, double x, double y, double z, boolean optimizeEntities) {
+        // Paper end - Perf: Optimize Hoppers
         Container iinventory = HopperBlockEntity.getBlockContainer(world, pos, state);
 
-        if (iinventory == null) {
+        if (iinventory == null && (!optimizeEntities || !world.paperConfig().hopper.ignoreOccludingBlocks || !state.getBukkitMaterial().isOccluding())) { // Paper - Perf: Optimize Hoppers
             iinventory = HopperBlockEntity.getEntityContainer(world, x, y, z);
         }
 
@@ -613,13 +863,13 @@ public class HopperBlockEntity extends RandomizableContainerBlockEntity implemen
 
     @Nullable
     private static Container getEntityContainer(Level world, double x, double y, double z) {
-        List<Entity> list = world.getEntities((Entity) null, new AABB(x - 0.5D, y - 0.5D, z - 0.5D, x + 0.5D, y + 0.5D, z + 0.5D), EntitySelector.CONTAINER_ENTITY_SELECTOR);
+        List<Entity> list = world.getEntitiesOfClass((Class) Container.class, new AABB(x - 0.5D, y - 0.5D, z - 0.5D, x + 0.5D, y + 0.5D, z + 0.5D), EntitySelector.CONTAINER_ENTITY_SELECTOR); // Paper - Perf: Optimize hoppers
 
         return !list.isEmpty() ? (Container) list.get(world.random.nextInt(list.size())) : null;
     }
 
     private static boolean canMergeItems(ItemStack first, ItemStack second) {
-        return first.getCount() <= first.getMaxStackSize() && ItemStack.isSameItemSameComponents(first, second);
+        return first.getCount() < first.getMaxStackSize() && ItemStack.isSameItemSameComponents(first, second); // Paper - Perf: Optimize Hoppers; used to return true for full itemstacks?!
     }
 
     @Override
diff --git a/src/main/java/net/minecraft/world/level/block/entity/RandomizableContainerBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/RandomizableContainerBlockEntity.java
index 13c9a68b604d4c7c6e09e72b3cea7ab2214b06ab..e2752752417c50b06f7c15b7d00bda0eaad3b0ae 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/RandomizableContainerBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/RandomizableContainerBlockEntity.java
@@ -53,7 +53,7 @@ public abstract class RandomizableContainerBlockEntity extends BaseContainerBloc
 
     @Override
     public ItemStack getItem(int slot) {
-        this.unpackLootTable(null);
+        if (slot == 0) this.unpackLootTable(null); // Paper - Perf: Optimize Hoppers
         return super.getItem(slot);
     }