You're shipping a new feed feature. After launch, which client metrics and target values would you use to define "it works well"?
Turn "works well" into numbers. Split it into user perception (time to first content, scroll hitch rate, image load time), stability (crash-free session rate), and resources (network bytes per session, memory), with a p90 target per metric. For example, time to first content under 800ms at p90, hitch under 5ms/s, crash-free sessions above 99.8%.
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