Futures: Twitter vs Scala

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" summary

Compares Twitter Futures and Scala Futures by naming concrete features and tradeoffs: Twitter Futures use local scheduling via a tiny thread‑local scaler to reduce context switches and boost throughput in Finagle, implement promise link compression (root linking) to allow unbounded future recursion without heap growth, and expose interrupts and locals so cancellations, request timeouts, and request‑scoped context propagate and can be serialized over the wire. Scala 2.12 adds similar root compression; the Twitter implementation is simple (<100 lines for key pieces) and proven in production.

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" chapters (6)

1. 0:00Introduction
2. 3:35Future implementation
3. 4:35Local scaling
4. 10:23Scala 212
5. 10:47Interrupt
6. 17:13Conclusion

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