"=". My bad. That's what happens when you work without IDE support.
I paste code of functions here, but i use them as .js files.

I tried your code today but unfortunately it also have this lag.
Maybe we can somehow reach UI style selection functions (those that fires up when we press near style gui to select all obj)?
They sure doesn't have any performance issues.

Here is how this lag looks like: https://www.dropbox.com/s/wjy47s71b8quh5r/Dv5mujpFSg.mp4
I use " SHIFT+` " as hotkey to fire script.