Use ClassValue to store tileentity names for profiler in lazy cache. (#4021)

patches/minecraft/net/minecraft/profiler/Profiler.java.patch

@@ -1,6 +1,6 @@
 --- ../src-base/minecraft/net/minecraft/profiler/Profiler.java
 +++ ../src-work/minecraft/net/minecraft/profiler/Profiler.java
-@@ -177,4 +177,15 @@
+@@ -177,4 +177,16 @@
                  return (this.field_76331_c.hashCode() & 11184810) + 4473924;
              }
          }
@@ -8,6 +8,7 @@
 +    /**
 +     * Forge: Fix for MC-117087, World.updateEntities is wasting time calling Class.getSimpleName() when the profiler is not active
 +     */
++    @Deprecated // TODO: remove (1.13)
 +    public void startSection(Class<?> profiledClass)
 +    {
 +        if (this.field_76327_a)

patches/minecraft/net/minecraft/world/World.java.patch

@@ -415,7 +415,7 @@
                      try
                      {
 -                        this.field_72984_F.func_76320_a(tileentity.getClass().getSimpleName());
-+                        this.field_72984_F.startSection(tileentity.getClass()); // Fix for MC-117087
++                        this.field_72984_F.func_76320_a(this.field_72984_F.field_76327_a ? net.minecraftforge.common.ForgeHooks.getRegistryName(tileentity.getClass()) : ""); // Fix for MC-117087
                          ((ITickable)tileentity).func_73660_a();
                          this.field_72984_F.func_76319_b();
                      }

src/main/java/net/minecraftforge/common/ForgeHooks.java

@@ -1247,6 +1247,21 @@ public class ForgeHooks
         MinecraftForge.EVENT_BUS.post(new BlockEvent.CropGrowEvent.Post(worldIn, pos, state, worldIn.getBlockState(pos)));
     }
 
+    private static final ClassValue<String> registryNames = new ClassValue<String>()
+    {
+        @Override
+        @SuppressWarnings("unchecked")
+        protected String computeValue(Class<?> type)
+        {
+            return String.valueOf(TileEntity.getKey((Class<? extends TileEntity>) type));
+        }
+    };
+
+    public static String getRegistryName(Class<? extends TileEntity> type)
+    {
+        return registryNames.get(type);
+    }
+
     public static boolean loadAdvancements(Map<ResourceLocation, Advancement.Builder> map)
     {
         boolean errored = false;