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December 6th, 2025, ISSUE 606

READING

First class support for compilation profiling

Since scala 3.6.3 the compiler provides way to easily profile the compilation.
Voytek Pituła (@Krever01)
Understanding Capture Checking in Scala

A hands-on tour of Scala 3.8’s new capability types, showing how ^ keeps your resources and effects from “escaping” where they shouldn’t.
Adam Warski (@adamwarski)
Laminar components inside React

I wanted to use React as little as possible, especially with State as I think Airstream is cleaner to reason about vs React hooks, so here are 3 tricks I used.
anIgnorant

VIDEOS

Save your Scala apps from the LazyValpocalypse

Learn more about what's changing with Lazy Vals in JDK 26, why it's a danger for Scala 3 applications, and what's being done to avoid a disaster, with Łukasz Biały from VirtusLab.
Jakub Kozłowski, Łukasz Biały (@kubukoz, @lukasz_bialy)
To Effect or Not to Effect - a Scala Perspective

In this talk, we will explore the benefits of effect systems in Scala, the different approaches to effects, how effects make our code more modular and powerful, and the tradeoffs we need to make in the code—all with realistic examples from personal experience and the experience of companies using them.
Daniel Ciocîrlan (@rockthejvm)

RELEASES

tapir 1.13.0

Tapir 1.13.0 refines server interceptors: richer request metadata, sharper metrics and logging for all requests, plus small upgrades to Ox, Armeria, zio-http and sttp-mock-server.
tapir contributors
Spark 4.X / Scala 2.13.X on AWS EMR

A preview release of AWS runtime for Apache Spark based on Spark 4 and Scala 2.13!
AWS
scala-appcontext 0.3.0

Minimalistic, type-driven dependency-injection library. Version 0.3.0 brings an important fix to implicit search priority.
Ruslan Shevchenko (@rssh1)

EVENTS

Scalar, Mar 26th - 27th, 2026, Warsaw, Poland

Join Scalar Conference 2026 and prepare for two exciting days of learning about functional programming with a fantastic community!
SoftwareMill (@softwaremill)

VARIA

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  1. Scala Times Issue #606

    First class support for compilation profiling. Understanding Capture Checking in Scala. Laminar components inside React. Save your Scala apps from the LazyValpocalypse. To Effect or Not to Effect - a Scala Perspective.

  2. Scala Times Issue #605

    Join us for the Advent of Code 2025. Scala Days 2025: Conference Highlights and Talk Recordings. Metals v1.6.4 - Osmium. Scalar, Mar 26th - 27th, 2026, Warsaw, Poland.

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