This post is from the WWDC26 App Intents & Siri Q&A.
Apple Music's Live Activity has instantly responsive prev/next/pause intents.
Similar Buttons and Toggles on our Live Activity shimmer for a second or two as the LiveActivityIntent perform body executes light work in our main process, the content update is submitted and serialized, and that update finally renders. That makes our Live Activity a bit clunky. The delays also nixed some useful interactive feature ideas.
The slow response is true even if our main process was running in the background with an active HKLiveWorkoutBuilder.
Is this an expected limitation? Is there a strategy we should have taken to avoid this? (We do use optimistic animations via Toggle to soften the edges a bit.)
