VEX Select Edges By Primitive Attribute SOP
Selects edges using a primitive attribute that have different values for each primitive of the edge.
This is a VEX-based operator, and it's much faster than the built-in Group from Attribute Boundary SOP, which is single-threaded. Multi-threaded operators are always preferred for scaleable performance. If you don't include unshared edges, it's even faster.
Half edges provide a lot of functionality when it comes to dealing with edges, so using these one can remove a lot of bottlenecks in a complex network.
VEX Select Unshared Edges SOP
Selects edges that are shared only by a single primitive.
https://www.dropbox.com/s/5elvpuctxh6fjby/group_from_attribute_boundary.hiplc?dl=1
I also zipped all the tools shared up until this point so you can download everything easier.
https://www.dropbox.com/s/lso2fyjkv71qlhd/Animatrix.zip?dl=1