Detangling Your Dependency Graph

on YouTube ↗25m

" summary

Instagram modularizes its Android app by carving features into feature directories with an interface/impl split, uses a dependency analyzer script to find easy leaves to extract, and enforces rules with a small mod squad plus diff-time dependency tests and APK/DEX size alerts. The team prototypes example modules, documents patterns, federates work across 20+ product teams, and already catches bad deps on diffs; full app-wide gains (startup, build, APK shrinkage via Dynamic Feature use) are gradual but underway.

AI-written summary · about

" chapters (8)

1. 0:00Introduction
2. 1:53Performance risks of growth
3. 4:01Impact of tangled dependencies
4. 10:23Modularization approach
5. 13:31Moving code to feature modules
6. 18:26Challenges of ongoing modularization
7. 22:00Enforcing modularization rules
8. 24:07Conclusion and next steps

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