Performance for Everyone

Pinterest's approach to automatically measuring user-perceived latency (Visually Complete) on Android surfaces by embedding measurement logic into base UI classes.

• •User-perceived latency is crucial for mobile app performance, but defining Visually Complete varies by surface (e.g., video playback vs. image rendering)
• •Implementing custom measurement logic for each surface required approximately two engineer-weeks per surface, creating a barrier for product engineers
• •Solution: Built Visually Complete logic into BaseSurface class with common media view interfaces (PerfImageView, PerfTextView, PerfVideoView)
• •System iterates through the view tree to check rendering status of all visible UI elements, automatically measuring latency for any new surfaces
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