Comment # 21 on bug 100239 from Timothy Arceri

(In reply to network723 from comment #20)
> (In reply to Timothy Arceri from comment #19)
> > Does that fix the issue for you?
> 
> Yes, it does fix scope rendering for me.
> Is any negative performance impact to be expected with that flag?

Potentially but it's unlikely to be noticeable. 

> Also, is it doing effectively same thing as patch from comment #9?

Yes.