Exploring Elixir Project Re compilation
summary
Explains how Elixir decides which .ex files recompile: runtime vs export dependency vs compile dependency, how cycles and “double” paths cause distant cascades, and how separating behaviors and macros into their own modules removes transient compile deps. Uses mix xref (graph, cycles, trace) to trace edges, shows extracting behavior/macro code reduces recompiled files from 42 to 2 and build time from ~4s to ~0.5s, and suggests CI checks to prevent regressions.
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chapters (7)
- 0:0004:14 - Intro
- 4:1507:03 - Dependencies
- 7:0413:25 - Cycles
- 13:2617:02 - Double Dependencies
- 17:0318:17 - Key Discoveries
- 18:1827:57 - Export Dependencies
- 27:5830:20 - QnA
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