Some good advice here on measuring scroll performance.
Your application runs buttery smooth on your local machine -- good work! But, how does it perform on your users device out in the real world? To answer that, we need real user measurement (RUM) for RAIL + API's that will help us adapt and optimize the experience at runtime.

Gave a brief talk at the Chrome Dev Summit yesterday with an overview of the various efforts we've been working on to address these needs! Have questions or feedback? Let me know!
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