Can someone help me identify the proper Pololu encoder arduino library?

Greetings,

I have this motor: https://www.pololu.com/product/3218
I have this pololu motor shield: https://www.pololu.com/product/2503

We attempted to write our own code to interpret the encoder but were advised it was incredibly inefficient. Can you please point me to the right library?

A post was merged into an existing topic: Problem reading two Pololu 12V motor encoders with Uno and Pololu MC33926