Callstack: Caching React Native Builds on S3 and R2
Original post Caching React Native Builds on S3 and R2
Article Summary
Your React Native CI builds are probably slower and more expensive than they need to be. Callstack just shared a practical caching strategy that could change that.
Callstack's latest article tackles a common pain point in React Native CI/CD: slow, costly builds that repeat the same work. They explore using S3 and Cloudflare R2 as caching layers to speed up build times and reduce infrastructure costs.
Key Takeaways
- S3 and R2 can cache React Native build artifacts between CI runs
- Proper caching eliminates redundant compilation and dependency resolution
- Works with existing CI/CD pipelines without major infrastructure changes
Strategic build caching on S3 or R2 can dramatically reduce React Native CI times and costs by reusing artifacts across builds.
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What This Article Covers
React Native CI builds take too long and cost a lot because the pipeline compiles code and resolves dependencies repeatedly without reusing artifacts from previous runs.
Callstack shows how to use S3 and Cloudflare R2 as caching layers that store build artifacts between CI runs, so you don't have to rebuild everything each time.
Teams that use this caching approach get faster builds and lower cloud costs because they can pull artifacts from storage instead of building from scratch on every run.
This page summarizes “Caching React Native Builds on S3 and R2” by Callstack, published Jun 19, 2025. All credit for the original work goes to the authors.
