From 827526e20023eab2a96409dc9b92d984c03c80a6 Mon Sep 17 00:00:00 2001
From: Felix Cravic <themode@outlook.fr>
Date: Sat, 1 Aug 2020 10:40:43 +0200
Subject: [PATCH] Optimize Inventory#clear

---
 src/main/java/net/minestom/server/inventory/Inventory.java | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/main/java/net/minestom/server/inventory/Inventory.java b/src/main/java/net/minestom/server/inventory/Inventory.java
index dfd98db8d..d5857a33e 100644
--- a/src/main/java/net/minestom/server/inventory/Inventory.java
+++ b/src/main/java/net/minestom/server/inventory/Inventory.java
@@ -286,6 +286,7 @@ public class Inventory implements InventoryModifier, InventoryClickHandler, View
 
     protected void setItemStackInternal(int slot, ItemStack itemStack) {
         itemStacks[slot] = itemStack;
+        this.windowItemsBufferUpdated = false;
     }
 
     /**
@@ -608,9 +609,11 @@ public class Inventory implements InventoryModifier, InventoryClickHandler, View
     }
 
     public void clear() {
-        // TODO: optimize by sending whole inventory at once? (will need to change to setItemStackInternal)
+        // Clear the item array
         for (int i = 0; i < getSize(); i++) {
-            setItemStack(i, ItemStack.getAirItem());
+            setItemStackInternal(i, ItemStack.getAirItem());
         }
+        // Send the cleared inventory to viewers
+        update();
     }
 }