Performance for Everyone Author: Lin Wang (Android Performance Engineer) Default Feature For mobile apps, performance is considered as the “default feature”, which means apps are expected to run …

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Pinterest Engineering

Pinterest's Android performance team built a universal 'Visually Complete' measurement system by embedding perceived latency tracking into a base UI class (BaseSurface). By walking the view tree and checking rendering status of common media view interfaces (PerfImageView, PerfTextView, PerfVideoView), any surface built on BaseSurface automatically gets user perceived latency metrics — eliminating the previous two engineer-weeks cost per surface. The system now monitors over 60 surfaces simultaneously and has been extended to iOS and web.