Scalaz Stream: Rebirth

on YouTube ↗44m

" summary

A next-generation scalaz-stream reimplementation targets the Scalaz 8 / ZIO effect model, exposing only Stream and Sink and abandoning spine deconstruction and cyclical graphs to gain leak-free resource handling and automatic interruption. Implementation uses a left-fold/final encoding with continuations to suspend and transfer iteration, plus a toQueue primitive for composition. Benchmarks: 50M-int sum shows ~20× Akka speed, CSV tokenization is ~3× faster than FS2 (and 30× Akka in one test). Source, tests, docs and benchmarks are on a live pull request; queues and some fusion need further optimization.

AI-written summary · about

" chapters (9)

1. 0:00Introduction
2. 1:24Modernizing ScalaZ Stream
3. 3:34Motivation and API sneak peek
4. 10:43Core abstractions: Stream and Sink
5. 20:18Performance benchmarks
6. 24:15Stream design: Folds vs initial encoding
7. 31:52Overcoming fold limitations
8. 37:28Future roadmap
9. 40:16Q&A

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