Startup Time: Your App’s Make or Break Moment | by Dream Blog | Dream Locker Room | Medium
Article Summary
Dream11 serves 230M sports fans with 15M+ concurrent users during IPL. Their React Native app startup time was killing conversions.
The Dream11 engineering team broke down their app launch performance into measurable segments (TTID and TTFD) and systematically optimized each bottleneck. Here's how they reduced startup time and improved business metrics.
Key Takeaways
- Enabled Hermes binary bundle to shift JS compilation from runtime to build time
- Prefetched critical data during idle network time while app initialized
- Deferred hundreds of GraphQL function executions until actually needed
- Used Android baseline profiles for AOT compilation of startup paths
- Lazy loaded content providers and complex views with viewStub
Critical Insight
Strategic optimizations across React Native, Android native code, and network layer delivered measurable startup time improvements that directly impacted contest participation rates.
