Making Reproducible Builds Faster with Docker Bake
summary
Honeycomb replaces multi-step workspace copying with Docker Bake plus BuildKit to keep outputs on one worker and chain targets, eliminating writing ~3 GB per job and reducing CI IO by 90% less data transferred. Builds drop from ~12–14 minutes to around 7 minutes on average, and total builds scale from ~500 to ~1,000 per week while CI costs stay flat. Also shows tracing via OpenTelemetry from buildx and tradeoffs using M4-like ephemeral VMs with warm-cache 3m / cold-cache 5m / overloaded 10m behavior.
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chapters (10)
- 0:00Slow builds frustration
- 3:27Tracing build bottlenecks
- 5:35CircleCI build slowness
- 8:21Docker Bake optimizations
- 11:11BuildKit native tracing
- 12:37Results and regression
- 13:42Namespace Labs speedup
- 16:52Developer behavior changes
- 17:36AI impact on builds
- 19:21Key takeaways
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