Efficient Android Builds at Scale: Lessons from Pinterest

on YouTube ↗26m

" summary

Pinterest runs 458 modules across about 30,000 CI builds/month and 100 active Android engineers, uses Gradle with three-tier caching and a warmed inner Docker image to prime local caches, and achieves a 41s P50 local assemble with a 5.5m full build P50. Engineering adds convention plugins, an Android Studio plugin, a cache prefetcher that fetches remote keys at checkout, and CI split across EC2 node classes; CI goals target 15m PR P50 and 97% master success rate.

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" chapters (17)

1. 0:00Introduction
2. 1:04Pinterest’s Android build scale
3. 2:09Gradle build phases and caching
4. 5:01Project setup and tools
5. 7:28Convention plugins and dependencies
6. 9:32Local build metrics and goals
7. 11:01Gradle configuration cache
8. 12:46FastDev debug variant
9. 14:35CI workflow and PR checks
10. 16:17CI build metrics and rates
11. 17:20CI infrastructure and nodes
12. 20:10Docker setup and optimization
13. 21:36GitHub checks and automation
14. 22:40Monitoring slow CI steps
15. 23:44Build health process
16. 24:47Balancing quantitative and qualitative data
17. 25:50Developer experience and hiring

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