Fixes slow oredict comparison, fixes #1044

src/main/java/com/raoulvdberge/refinedstorage/api/IRSAPI.java

@@ -118,9 +118,19 @@ public interface IRSAPI {
 
     /**
      * @param stack the stack
+     * @param tag   whether the NBT tag of the stack should be calculated in the hashcode
      * @return a hashcode for the given stack
      */
-    int getItemStackHashCode(ItemStack stack);
+    int getItemStackHashCode(ItemStack stack, boolean tag);
+
+
+    /**
+     * @param stack the stack
+     * @return a hashcode for the given stack
+     */
+    default int getItemStackHashCode(ItemStack stack) {
+        return getItemStackHashCode(stack, true);
+    }
 
     /**
      * @param stack the stack

src/main/java/com/raoulvdberge/refinedstorage/apiimpl/API.java

@@ -186,8 +186,8 @@ public class API implements IRSAPI {
     }
 
     @Override
-    public int getItemStackHashCode(ItemStack stack) {
-        return stack.getItem().hashCode() * (stack.getItemDamage() + 1) * (stack.hasTagCompound() ? stack.getTagCompound().hashCode() : 1);
+    public int getItemStackHashCode(ItemStack stack, boolean tag) {
+        return stack.getItem().hashCode() * (stack.getItemDamage() + 1) * ((tag && stack.hasTagCompound()) ? stack.getTagCompound().hashCode() : 1);
     }
 
     @Override

src/main/java/com/raoulvdberge/refinedstorage/apiimpl/util/Comparer.java

@@ -117,8 +117,9 @@ public class Comparer implements IComparer {
             return validity == EnumActionResult.SUCCESS;
         }
 
-        int code = API.instance().getItemStackHashCode(left);
-        code = 31 * code + API.instance().getItemStackHashCode(right);
+        // We do not care about the NBT tag since the oredict doesn't care either, and generating a NBT hashcode is slow.
+        int code = API.instance().getItemStackHashCode(left, false);
+        code = 31 * code + API.instance().getItemStackHashCode(right, false);
 
         if (oredictCache.containsKey(code)) {
             return oredictCache.get(code);