Profile editor - Performance improvements

src/Artemis.Core/Models/Profile/DataBindings/Modifiers/PercentageOfModifierType.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+
+namespace Artemis.Core
+{
+    internal class PercentageOfModifierType : DataBindingModifierType
+    {
+        public PercentageOfModifierType()
+        {
+            PreferredParameterType = typeof(float);
+        }
+
+        public override IReadOnlyCollection<Type> CompatibleTypes => Constants.NumberTypes;
+
+        public override string Description => "Percentage of";
+        public override string Icon => "Percent";
+
+        public override object Apply(object currentValue, object parameterValue)
+        {
+            var parameter = Convert.ToSingle(parameterValue);
+            // Ye ye none of that
+            if (parameter == 0f)
+                return 100f;
+
+            return 100f / Convert.ToSingle(parameterValue) * Convert.ToSingle(currentValue);
+        }
+    }
+}