Better Scala builds with the Mill build tool

on YouTube ↗32m

" summary

Argues that Mill replaces SBT with a simpler, faster workflow: an 80k‑line Gatling port with 20 subprojects takes ~3 hours to convert and tests pass, cold CLI runs are fast because Mill spawns a background server and auto‑reloads, assemblies become incremental so large Spark jars go from ~20s to ~1s on change, and IDE features work because builds are plain Scala enabling jump‑to‑definition. Built‑in Chrome trace profiler, easy custom tasks (example: file line‑count written as a task), JVM/Scala/JS/native support.

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" chapters (6)

1. 0:00The challenges with SBT
2. 6:09Introducing Mill
3. 9:15Performance benefits of Mill
4. 15:12IDE and build support
5. 17:26Extensibility in Mill
6. 25:26How Mill works

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