Minor optimization to ForgeRegistry.validateContent

src/main/java/org/embeddedt/modernfix/core/config/ModernFixEarlyConfig.java

@@ -19,6 +19,7 @@ public class ModernFixEarlyConfig {
         this.addMixinRule("core", true); // TODO: Don't actually allow the user to disable this
         this.addMixinRule("feature.measure_time", true);
         this.addMixinRule("feature.reduce_loading_screen_freezes", false);
+        this.addMixinRule("perf.fast_registry_validation", true);
         this.addMixinRule("perf.remove_biome_temperature_cache", true);
         this.addMixinRule("perf.resourcepacks", true);
         this.addMixinRule("perf.reduce_blockstate_cache_rebuilds", true);

src/main/java/org/embeddedt/modernfix/mixin/perf/fast_registry_validation/ForgeRegistryMixin.java

@@ -0,0 +1,28 @@
+package org.embeddedt.modernfix.mixin.perf.fast_registry_validation;
+
+import net.minecraftforge.fml.common.ObfuscationReflectionHelper;
+import net.minecraftforge.registries.ForgeRegistry;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+import java.lang.reflect.Method;
+
+@Mixin(value = ForgeRegistry.class, remap = false)
+public class ForgeRegistryMixin {
+    private static Method bitSetTrimMethod = null;
+    private static boolean bitSetTrimMethodRetrieved = false;
+
+    /**
+     * Cache the result of findMethod instead of running it multiple times.
+     * Null checks are not required as the surrounding code handles it already.
+     */
+    @Redirect(method = "validateContent", at = @At(value = "INVOKE", target = "Lnet/minecraftforge/fml/common/ObfuscationReflectionHelper;findMethod(Ljava/lang/Class;Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;"))
+    private Method skipMultipleRemap(Class<?> clz, String methodName, Class<?>[] params) {
+        if(!bitSetTrimMethodRetrieved) {
+            bitSetTrimMethodRetrieved = true;
+            bitSetTrimMethod = ObfuscationReflectionHelper.findMethod(clz, methodName, params);
+        }
+        return bitSetTrimMethod;
+    }
+}

src/main/resources/modernfix.mixins.json

@@ -47,7 +47,8 @@
     "perf.kubejs.RecipeEventJSMixin",
     "perf.kubejs.RecipeJSMixin",
     "perf.kubejs.IDFilterMixin",
-    "perf.kubejs.CustomIngredientMixin"
+    "perf.kubejs.CustomIngredientMixin",
+    "perf.fast_registry_validation.ForgeRegistryMixin"
   ],
   "client": [
     "core.MinecraftMixin",