Don't waste time parsing UVs when performing initial model load

src/main/java/org/embeddedt/modernfix/dynamicresources/UVController.java

@@ -0,0 +1,8 @@
+package org.embeddedt.modernfix.dynamicresources;
+
+import net.minecraft.client.renderer.block.model.BlockFaceUV;
+
+public class UVController {
+    public static final ThreadLocal<Boolean> useDummyUv = ThreadLocal.withInitial(() -> Boolean.FALSE);
+    public static final BlockFaceUV dummyUv = new BlockFaceUV(new float[4], 0);
+}

src/main/java/org/embeddedt/modernfix/mixin/perf/dynamic_resources/BlockElementFaceDeserializerMixin.java

@@ -0,0 +1,21 @@
+package org.embeddedt.modernfix.mixin.perf.dynamic_resources;
+
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonElement;
+import net.minecraft.client.renderer.block.model.BlockElementFace;
+import org.embeddedt.modernfix.dynamicresources.UVController;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+import java.lang.reflect.Type;
+
+@Mixin(BlockElementFace.Deserializer.class)
+public class BlockElementFaceDeserializerMixin {
+
+    @Redirect(method = "deserialize(Lcom/google/gson/JsonElement;Ljava/lang/reflect/Type;Lcom/google/gson/JsonDeserializationContext;)Lnet/minecraft/client/renderer/block/model/BlockElementFace;",
+            at = @At(value = "INVOKE", target = "Lcom/google/gson/JsonDeserializationContext;deserialize(Lcom/google/gson/JsonElement;Ljava/lang/reflect/Type;)Ljava/lang/Object;", ordinal = 0))
+    private Object skipUvsForInitialLoad(JsonDeserializationContext context, JsonElement element, Type type) {
+        return UVController.useDummyUv.get() ? UVController.dummyUv : context.deserialize(element, type);
+    }
+}

src/main/java/org/embeddedt/modernfix/mixin/perf/dynamic_resources/ModelBakeryMixin.java

@@ -40,10 +40,7 @@ import org.apache.commons.lang3.tuple.Triple;
 import org.apache.logging.log4j.Logger;
 import org.embeddedt.modernfix.ModernFix;
 import org.embeddedt.modernfix.duck.IExtendedModelBakery;
-import org.embeddedt.modernfix.dynamicresources.DynamicBakedModelProvider;
+import org.embeddedt.modernfix.dynamicresources.*;
-import org.embeddedt.modernfix.dynamicresources.DynamicModelBakeEvent;
-import org.embeddedt.modernfix.dynamicresources.ModelLocationCache;
-import org.embeddedt.modernfix.dynamicresources.ResourcePackHandler;
 import org.spongepowered.asm.mixin.*;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
@@ -286,10 +283,12 @@ public abstract class ModelBakeryMixin implements IExtendedModelBakery {
             }
             modelFiles.clear();
             CompletableFuture.allOf(modelBytes.toArray(new CompletableFuture[0])).join();
+            UVController.useDummyUv.set(Boolean.TRUE);
             for(CompletableFuture<Pair<ResourceLocation, JsonElement>> future : modelBytes) {
                 Pair<ResourceLocation, JsonElement> pair = future.join();
                 try {
                     if(pair.getSecond() != null) {
+
                         BlockModel model = ModelLoaderRegistry.ExpandedBlockModelDeserializer.INSTANCE.fromJson(pair.getSecond(), BlockModel.class);
                         model.name = pair.getFirst().toString();
                         modelFiles.addAll(model.getDependencies());
@@ -301,6 +300,7 @@ public abstract class ModelBakeryMixin implements IExtendedModelBakery {
                 }
                 basicModels.put(pair.getFirst(), (BlockModel)missingModel);
             }
+            UVController.useDummyUv.set(Boolean.FALSE);
         }
         modelFiles = null;
         Function<ResourceLocation, UnbakedModel> modelGetter = loc -> {

src/main/resources/modernfix.mixins.json

@@ -79,6 +79,7 @@
     "bugfix.concurrency.RenderTypeMixin",
     "bugfix.concurrency.MinecraftMixin",
     "bugfix.concurrency.StaticTagHelperMixin",
+    "perf.dynamic_resources.BlockElementFaceDeserializerMixin",
     "perf.dynamic_resources.BlockModelShaperMixin",
     "perf.dynamic_resources.ItemModelShaperMixin",
     "perf.dynamic_resources.ModelBakeryMixin",