diff --git a/common/src/main/java/org/embeddedt/modernfix/dynamicresources/DynamicBakedModelProvider.java b/common/src/main/java/org/embeddedt/modernfix/dynamicresources/DynamicBakedModelProvider.java
index 304b669d..b602af14 100644
--- a/common/src/main/java/org/embeddedt/modernfix/dynamicresources/DynamicBakedModelProvider.java
+++ b/common/src/main/java/org/embeddedt/modernfix/dynamicresources/DynamicBakedModelProvider.java
@@ -91,11 +91,6 @@ public class DynamicBakedModelProvider implements Map<ResourceLocation, BakedMod
             currentInstance = this;
     }
 
-    public void setMissingModel(BakedModel model) {
-        this.missingModel = model;
-        this.put(ModelBakery.MISSING_MODEL_LOCATION, this.missingModel);
-    }
-
     private static ModelBakery.BakedCacheKey vanillaKey(Object o) {
         return new ModelBakery.BakedCacheKey((ResourceLocation)o, BlockModelRotation.X0_Y0.getRotation(), false);
     }
@@ -140,6 +135,14 @@ public class DynamicBakedModelProvider implements Map<ResourceLocation, BakedMod
         return false;
     }
 
+    private BakedModel getMissingModel() {
+        BakedModel m = missingModel;
+        if(m == null) {
+            m = missingModel = ((IExtendedModelBakery)bakery).bakeDefault(ModelBakery.MISSING_MODEL_LOCATION, BlockModelRotation.X0_Y0);
+        }
+        return m;
+    }
+
     @Override
     public BakedModel get(Object o) {
         BakedModel model = permanentOverrides.getOrDefault(o, SENTINEL);
@@ -148,14 +151,14 @@ public class DynamicBakedModelProvider implements Map<ResourceLocation, BakedMod
         else {
             try {
                 if(BAKE_SKIPPED_TOPLEVEL.contains((ResourceLocation)o))
-                    model = missingModel;
+                    model = getMissingModel();
                 else
                     model = ((IExtendedModelBakery)bakery).bakeDefault((ResourceLocation)o, BlockModelRotation.X0_Y0);
             } catch(RuntimeException e) {
                 ModernFix.LOGGER.error("Exception baking {}: {}", o, e);
-                model = missingModel;
+                model = getMissingModel();
             }
-            if(model == missingModel) {
+            if(model == getMissingModel()) {
                 // to correctly emulate the original map, we return null for missing models, unless they are top-level
                 model = isVanillaTopLevelModel((ResourceLocation)o) ? model : null;
                 permanentOverrides.put((ResourceLocation) o, model);
diff --git a/forge/src/main/java/org/embeddedt/modernfix/forge/mixin/bugfix/entity_pose_stack/LivingEntityRendererMixin.java b/forge/src/main/java/org/embeddedt/modernfix/forge/mixin/bugfix/entity_pose_stack/LivingEntityRendererMixin.java
new file mode 100644
index 00000000..10109809
--- /dev/null
+++ b/forge/src/main/java/org/embeddedt/modernfix/forge/mixin/bugfix/entity_pose_stack/LivingEntityRendererMixin.java
@@ -0,0 +1,30 @@
+package org.embeddedt.modernfix.forge.mixin.bugfix.entity_pose_stack;
+
+import com.mojang.blaze3d.vertex.PoseStack;
+import net.minecraft.client.renderer.entity.LivingEntityRenderer;
+import net.minecraftforge.client.event.RenderLivingEvent;
+import net.minecraftforge.eventbus.api.Event;
+import net.minecraftforge.eventbus.api.IEventBus;
+import org.embeddedt.modernfix.annotation.ClientOnlyMixin;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(LivingEntityRenderer.class)
+@ClientOnlyMixin
+public class LivingEntityRendererMixin {
+    @Redirect(method = "render(Lnet/minecraft/world/entity/LivingEntity;FFLcom/mojang/blaze3d/vertex/PoseStack;Lnet/minecraft/client/renderer/MultiBufferSource;I)V", at = @At(value = "INVOKE", target = "Lnet/minecraftforge/eventbus/api/IEventBus;post(Lnet/minecraftforge/eventbus/api/Event;)Z", ordinal = 0))
+    private boolean fireCheckingPoseStack(IEventBus instance, Event event) {
+        PoseStack stack = ((RenderLivingEvent)event).getPoseStack();
+        int size = ((PoseStackAccessor)stack).getPoseStack().size();
+        if (instance.post(event)) {
+            // Pop the stack if someone pushed it in the event
+            while (((PoseStackAccessor)stack).getPoseStack().size() > size) {
+                stack.popPose();
+            }
+            return true;
+        } else {
+            return false;
+        }
+    }
+}
diff --git a/forge/src/main/java/org/embeddedt/modernfix/forge/mixin/bugfix/entity_pose_stack/PlayerRendererMixin.java b/forge/src/main/java/org/embeddedt/modernfix/forge/mixin/bugfix/entity_pose_stack/PlayerRendererMixin.java
new file mode 100644
index 00000000..71180460
--- /dev/null
+++ b/forge/src/main/java/org/embeddedt/modernfix/forge/mixin/bugfix/entity_pose_stack/PlayerRendererMixin.java
@@ -0,0 +1,30 @@
+package org.embeddedt.modernfix.forge.mixin.bugfix.entity_pose_stack;
+
+import com.mojang.blaze3d.vertex.PoseStack;
+import net.minecraft.client.renderer.entity.player.PlayerRenderer;
+import net.minecraftforge.client.event.RenderPlayerEvent;
+import net.minecraftforge.eventbus.api.Event;
+import net.minecraftforge.eventbus.api.IEventBus;
+import org.embeddedt.modernfix.annotation.ClientOnlyMixin;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(PlayerRenderer.class)
+@ClientOnlyMixin
+public class PlayerRendererMixin {
+    @Redirect(method = "render(Lnet/minecraft/client/player/AbstractClientPlayer;FFLcom/mojang/blaze3d/vertex/PoseStack;Lnet/minecraft/client/renderer/MultiBufferSource;I)V", at = @At(value = "INVOKE", target = "Lnet/minecraftforge/eventbus/api/IEventBus;post(Lnet/minecraftforge/eventbus/api/Event;)Z", ordinal = 0))
+    private boolean fireCheckingPoseStack(IEventBus instance, Event event) {
+        PoseStack stack = ((RenderPlayerEvent)event).getPoseStack();
+        int size = ((PoseStackAccessor)stack).getPoseStack().size();
+        if (instance.post(event)) {
+            // Pop the stack if someone pushed it in the event
+            while (((PoseStackAccessor)stack).getPoseStack().size() > size) {
+                stack.popPose();
+            }
+            return true;
+        } else {
+            return false;
+        }
+    }
+}
diff --git a/forge/src/main/java/org/embeddedt/modernfix/forge/mixin/bugfix/entity_pose_stack/PoseStackAccessor.java b/forge/src/main/java/org/embeddedt/modernfix/forge/mixin/bugfix/entity_pose_stack/PoseStackAccessor.java
new file mode 100644
index 00000000..a0a8ec30
--- /dev/null
+++ b/forge/src/main/java/org/embeddedt/modernfix/forge/mixin/bugfix/entity_pose_stack/PoseStackAccessor.java
@@ -0,0 +1,15 @@
+package org.embeddedt.modernfix.forge.mixin.bugfix.entity_pose_stack;
+
+import com.mojang.blaze3d.vertex.PoseStack;
+import org.embeddedt.modernfix.annotation.ClientOnlyMixin;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Accessor;
+
+import java.util.Deque;
+
+@Mixin(PoseStack.class)
+@ClientOnlyMixin
+public interface PoseStackAccessor {
+    @Accessor
+    Deque<PoseStack.Pose> getPoseStack();
+}
diff --git a/forge/src/main/java/org/embeddedt/modernfix/forge/mixin/perf/forge_registry_alloc/ForgeRegistryMixin.java b/forge/src/main/java/org/embeddedt/modernfix/forge/mixin/perf/forge_registry_alloc/ForgeRegistryMixin.java
index 920136ae..bf045369 100644
--- a/forge/src/main/java/org/embeddedt/modernfix/forge/mixin/perf/forge_registry_alloc/ForgeRegistryMixin.java
+++ b/forge/src/main/java/org/embeddedt/modernfix/forge/mixin/perf/forge_registry_alloc/ForgeRegistryMixin.java
@@ -1,5 +1,6 @@
 package org.embeddedt.modernfix.forge.mixin.perf.forge_registry_alloc;
 
+import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
 import net.minecraft.core.Holder;
 import net.minecraft.resources.ResourceKey;
 import net.minecraft.resources.ResourceLocation;
@@ -14,9 +15,11 @@ import java.util.Map;
 
 @Mixin(value = ForgeRegistry.class, remap = false)
 public abstract class ForgeRegistryMixin<V> {
-    @Shadow @Final private Map<ResourceLocation, Holder.Reference<V>> delegatesByName;
+    // Replace the backing maps with fastutil maps for a bit more speed, since value->holder lookups in particular
+    // are a bottleneck in many areas (e.g. render type lookup)
+    @Shadow @Final private Map<ResourceLocation, Holder.Reference<V>> delegatesByName = new Object2ObjectOpenHashMap<>();
 
-    @Shadow @Final private Map<V, Holder.Reference<V>> delegatesByValue;
+    @Shadow @Final private Map<V, Holder.Reference<V>> delegatesByValue = new Object2ObjectOpenHashMap<>();
 
     /**
      * @author embeddedt