Services Reloaded Increased Throughput with Project Loom Virtual Threads

on YouTube ↗41m

" summary

Claim: Project Loom virtual threads let synchronous thread-per-request code scale like reactive systems without rewriting APIs, using the JVM to schedule M:N threads. Demonstrations use JDK 19, configure Tomcat 10.1.1 or Jetty to use a virtual-thread executor, and frameworks like Quarkus nearly matches reactive throughput while Netty stays reactive-first. Caveats: JDBC and native/foreign libs can pin carrier threads—Oracle’s JDBC is updated—so third‑party blocking calls determine real scalability.

AI-written summary · about

" chapters (6)

1. 0:00Introduction and speaker intro
2. 3:37Java thread history and evolution
3. 10:28Reactive programming overview
4. 21:20Project Loom virtual threads explained
5. 31:39Using virtual threads in applications
6. 39:06Q&A and future of Project Loom

" related talks

• 57mJDK 19 Virtual Threads: Skip Reactive, Boost ThroughputKito Mann · Great International Developer Summit 2024
• 36mPreparing web applications for LoomMark Thomas · Spring I/O 2023
• 38mReactive ❤️ Loom: A Forbidden Love StoryFrancesco Nigro · Voxxed Days Ticino 2026
• 38mJava Project Loom: Why Should I Care?Erwin de Gier · GOTO Amsterdam 2023
• 31mJava Virtual ThreadsSergey Kuksenko · Oracle DevLive Level Up: Java Developer Day 2023
• 39mProject Loom: Modern Scalable Concurrency for the Java PlatformRon Pressler · Oracle Developer Live—Java 2020
• 35mUntangled: Sneak peek at Project LoomArnaud Bos · Voxxed Days Cluj-Napoca 2019
• 48mAre Virtual Threads Going to Make Reactive Programming Irrelevant?José Paumard · Jfokus 2025