Further KubeJS optimization

src/main/java/org/embeddedt/modernfix/mixin/perf/kubejs/RecipeEventJSMixin.java

@@ -0,0 +1,32 @@
+package org.embeddedt.modernfix.mixin.perf.kubejs;
+
+import dev.latvian.kubejs.recipe.RecipeEventJS;
+import dev.latvian.kubejs.recipe.RecipeJS;
+import dev.latvian.kubejs.recipe.filter.RecipeFilter;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Overwrite;
+import org.spongepowered.asm.mixin.Shadow;
+
+import java.util.List;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+
+@Mixin(RecipeEventJS.class)
+public class RecipeEventJSMixin {
+    @Shadow @Final private List<RecipeJS> originalRecipes;
+
+    /**
+     * @author embeddedt
+     * @reason parallelize filtering, then run the consumer on one thread
+     */
+    @Overwrite(remap = false)
+    public void forEachRecipe(RecipeFilter filter, Consumer<RecipeJS> consumer) {
+        if (filter == RecipeFilter.ALWAYS_TRUE) {
+            this.originalRecipes.forEach(consumer);
+        } else if (filter != RecipeFilter.ALWAYS_FALSE) {
+            List<RecipeJS> filtered = this.originalRecipes.parallelStream().filter(filter).collect(Collectors.toList());
+            filtered.forEach(consumer);
+        }
+    }
+}

src/main/java/org/embeddedt/modernfix/mixin/perf/kubejs/RecipeJSMixin.java

@@ -0,0 +1,22 @@
+package org.embeddedt.modernfix.mixin.perf.kubejs;
+
+import dev.latvian.kubejs.recipe.RecipeJS;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.crafting.Recipe;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(RecipeJS.class)
+public class RecipeJSMixin {
+    /**
+     * @author embeddedt
+     * @reason some mods seem to not like this being called concurrently, not sure why this doesn't crash in other scripts
+     */
+    @Redirect(method = "hasOutput", at = @At(value = "INVOKE", target = "Lnet/minecraft/world/item/crafting/Recipe;getResultItem()Lnet/minecraft/world/item/ItemStack;"))
+    private ItemStack syncResultItem(Recipe<?> recipe) {
+        synchronized (RecipeJS.class) {
+            return recipe.getResultItem();
+        }
+    }
+}

src/main/resources/modernfix.mixins.json

@@ -43,7 +43,9 @@
     "feature.measure_time.SimpleReloadableResourceManagerMixin",
     "feature.measure_time.ProfiledReloadInstanceMixin",
     "perf.kubejs.TagIngredientJSMixin",
-    "perf.kubejs.TagWrapperMixin"
+    "perf.kubejs.TagWrapperMixin",
+    "perf.kubejs.RecipeEventJSMixin",
+    "perf.kubejs.RecipeJSMixin"
   ],
   "client": [
     "feature.measure_time.MinecraftMixin",