Performance is part of product quality. We profile real journeys, optimize the expensive work and design graceful loading and error states so the app remains dependable on everyday devices.
Measure real user journeys
Track cold start, warm start, screen rendering, API latency and crash-free sessions. Device range and network quality matter as much as average laboratory scores.
Remove work from the main thread
Profile expensive layout, image decoding and data transformations. Lazy loading and sensible caching keep interaction responsive without hiding fundamental bottlenecks.
Design for network uncertainty
Show useful progress, preserve previous data and make retries clear. Timeouts and offline states should protect the user’s work instead of returning a generic failure.
Prevent regressions
Add budgets for app size, startup and key journeys to release checks. Performance becomes sustainable when the team can see when it changes.
Keep these three ideas.
- ✓Measure on realistic devices
- ✓Keep interaction work lightweight
- ✓Test weak-network behavior