Your comments

What is the API Updater tool ? if its the Plugin Update Wizard, Yes i'm up to date.

Here is the Full stack : 

MissingMethodException: Method not found: 'UnityEditor.PrefabUtility.GetCorrespondingObjectFromSource'.

Bolt.VariablesPanel.Object (UnityEngine.GameObject object) (at C:/Users/lazlo/Projects/Bolt1/Package/Bolt.Core/Editor/Variables/VariablesPanel.cs:194)

Bolt.VariablesPanel..ctor (IGraphContext context) (at C:/Users/lazlo/Projects/Bolt1/Package/Bolt.Core/Editor/Variables/VariablesPanel.cs:39)

Bolt.FlowGraphContext+d__3.MoveNext () (at C:/Users/lazlo/Projects/Bolt1/Package/Bolt.Flow/Editor/FlowGraphContext.cs:16)

System.Collections.Generic.List`1[Ludiq.ISidebarPanelContent].AddEnumerable (IEnumerable`1 enumerable) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Collections.Generic/List.cs:128)

System.Collections.Generic.List`1[Ludiq.ISidebarPanelContent]..ctor (IEnumerable`1 collection) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Collections.Generic/List.cs:65)

System.Linq.Enumerable.ToList[ISidebarPanelContent] (IEnumerable`1 source)

Ludiq.GraphContext`2[TGraph,TCanvas]..ctor (Ludiq.GraphReference reference)

Bolt.FlowGraphContext..ctor (Ludiq.GraphReference reference) (at C:/Users/lazlo/Projects/Bolt1/Package/Bolt.Flow/Editor/FlowGraphContext.cs:9)

System.Reflection.MonoCMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:513)

Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.

System.Reflection.MonoCMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:519)

System.Reflection.MonoCMethod.Invoke (BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:528)

System.Reflection.ConstructorInfo.Invoke (System.Object[] parameters) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/ConstructorInfo.cs:77)

Ludiq.TypeUtility+<>c__DisplayClass8_0.b__1 (System.Object[] args) (at C:/Users/lazlo/Projects/Bolt1/Package/Ludiq.Core/Runtime/Reflection/TypeUtility.cs:125)

Ludiq.TypeUtility.Instantiate (System.Type type, Boolean nonPublic, System.Object[] args) (at C:/Users/lazlo/Projects/Bolt1/Package/Ludiq.Core/Runtime/Reflection/TypeUtility.cs:154)

Ludiq.SingleDecoratorProvider`3[TDecorated,TDecorator,TAttribute].CreateDecorator (System.Type decoratorType, .TDecorated decorated) (at C:/Users/lazlo/Projects/Bolt1/Package/Ludiq.Core/Editor/Interface/EventWrapper.cs:210)

Ludiq.SingleDecoratorProvider`3[TDecorated,TDecorator,TAttribute].CreateDecorator (.TDecorated decorated) (at C:/Users/lazlo/Projects/Bolt1/Package/Ludiq.Core/Editor/Interface/EventWrapper.cs:211)

Ludiq.SingleDecoratorProvider`3[TDecorated,TDecorator,TAttribute].GetDecorator (.TDecorated decorated)

Ludiq.XGraphContextProvider.Context (Ludiq.GraphReference reference)

Ludiq.GraphWindow.set_reference (Ludiq.GraphReference value)

Ludiq.GraphWindow.b__54_0 ()

Ludiq.PluginContainer.add_delayCall (System.Action value) (at C:/Users/lazlo/Projects/Bolt1/Package/Ludiq.Core/Editor/Dependencies/SQLite/SQLite.cs:1706)

Ludiq.GraphWindow.OnEnable ()

Hey, I was about to post the same issue !!! We are having the same problem.

I made a test with a prefab that instantiate 90 gameobject with a Flow macro inside of them. It costed 1300ms !!!!!

I made an other test by replacing the Flow macro by a Regular Csharp scrpt and now it Cost only 13ms !!!!

Please fix that !

Awesome !! Thanks :D

I though that it would require a new set of nodes to work in the Editor intead of at runtime .

Well thanks to put it in the roadmap :)

Is it Compatible with 1.4 ? I have some issue :/

Failed to deserialize scriptable object.
System.Runtime.Serialization.SerializationException: Deserialization into 'Bolt.FlowMacro' failed. ---> System.TypeLoadException: Could not load type 'Bolt.Addons.Community.Logic.Units.OnEveryXSeconds' from 

.................

On what I saw in the Roadmap, the majority of them will be in Bolt v1.4

I forgot an Input for the first node 
The Animator Override Controller target

Wow ! An other node that I will use a lot :D

Thanks man !