CatServer/patches/net/minecraft/client/renderer/vertex/VertexFormat.java.patch

--- ../src-base/minecraft/net/minecraft/client/renderer/vertex/VertexFormat.java
+++ ../src-work/minecraft/net/minecraft/client/renderer/vertex/VertexFormat.java
@@ -17,6 +17,7 @@
     private int colorElementOffset;
     private final List<Integer> uvOffsetsById;
     private int normalElementOffset;
+    private int hashCode;
 
     public VertexFormat(VertexFormat vertexFormatIn)
     {
@@ -47,6 +48,7 @@
         this.uvOffsetsById.clear();
         this.normalElementOffset = -1;
         this.nextOffset = 0;
+        this.hashCode = 0;
     }
 
     @SuppressWarnings("incomplete-switch")
@@ -75,6 +77,7 @@
             }
 
             this.nextOffset += element.getSize();
+            this.hashCode = 0;
             return this;
         }
     }
@@ -204,9 +207,11 @@
 
     public int hashCode()
     {
+        if (this.hashCode != 0) return this.hashCode;
         int i = this.elements.hashCode();
         i = 31 * i + this.offsets.hashCode();
         i = 31 * i + this.nextOffset;
+        this.hashCode = i;
         return i;
     }
 }