Project Leyden

The primary goal of Project Leyden is to improve the startup time, time to peak performance, and footprint of Java programs.

2026

• Java - The Year of the Runtime! by Ron Pressler on October 11, 2026
• Episode 70 “AOT Caching - Netflix' Practice vs OpenJDK's Theory” [I/O] by John Rose, Martin Chalupa (Netflix), Nicolai Parlog on September 17, 2026
• Episode 62 “JDK 27 + Valhalla, Now! + Hackathon” [IJN] by Nicolai Parlog on July 19, 2026
• Can Java Microservices Be As Fast As Go? A 2026 Benchmark Update by Mark Nelson on June 15, 2026
• Java AOT in Production at Netflix by Martin Chalupa (Netflix), Ian Brown (Netflix) on May 23, 2026
• Episode 46 “Java's Plans for 2026” [IJN] by Nicolai Parlog on February 20, 2026
• Run Into the New Year with Java’s Ahead-of-Time Cache Optimizations by Ana-Maria Mihalceanu on January 9, 2026
• Java's Plans for 2026 - Inside Java Newscast #104 by Nicolai Parlog on January 8, 2026

2025

• Java's 2025 in Review - Inside Java Newscast #103 by Nicolai Parlog on December 18, 2025
• JEP targeted to JDK 26: 516: Ahead-of-Time Object Caching with Any GC by Erik Österlund on November 13, 2025
• Supercharge your JVM Performance with Project Leyden and Spring Boot by Ana-Maria Mihalceanu, Moritz Halbritter (guest) on November 2, 2025
• Assembling Project Leyden #JVMLS by Dan Heidinga on October 21, 2025
• Reviewing the JDK 25 Release Notes - Inside Java Newscast #98 by Billy Korando on September 25, 2025
• Ahead-of-Time Computation #RoadTo25 by Billy Korando on August 28, 2025
• JEP targeted to JDK 25: 515: Ahead-of-Time Method Profiling by Igor Veresov, John Rose on July 18, 2025
• Project Leyden's AOT - Shifting Java Startup into High Gear by Dan Heidinga on June 29, 2025
• JEP targeted to JDK 25: 514: Ahead-of-Time Command-Line Ergonomics by John Rose on June 26, 2025
• Ubuntu Ships Java, Spring, AOT by John Rose on June 4, 2025
• Episode 36 “Ahead of Time Computation” [AtA] by Dan Heidinga, Nicolai Parlog on May 16, 2025
• A Deep Dive into JVM Start-up by Billy Korando on January 28, 2025
• Java's Plans for 2025 - Inside Java Newscast #83 by Nicolai Parlog on January 16, 2025
• A Deep Dive into JVM Start Up - Stack Walker #6 by Billy Korando on January 9, 2025

2024

• A Preview of What's Coming in Project Leyden - Inside Java Newscast #78 by Billy Korando on October 17, 2024
• Best of Java Performance - Inside Java Newscast #75 by Ana-Maria Mihalceanu on August 29, 2024
• Project Leyden #JVMLS by Ioi Lam, Dan Heidinga on August 25, 2024
• Quality Outreach Heads-up - New Leyden Early-Access Builds by Ana-Maria Mihalceanu on June 24, 2024
• Project Leyden: Capturing Lightning in a Bottle by Per-Ake Minborg on February 28, 2024
• Java's Plans for 2024 - Inside Java Newscast #61 by Nicolai Parlog on January 18, 2024

2023

• Project Leyden by Brian Goetz on October 14, 2023
• JVMLS 2023 Keynote by Georges Saab, Mark Reinhold on September 14, 2023
• JVMLS - Project Leyden by Mark Reinhold, John Rose on September 7, 2023
• Using Computed Constants to Manage Static State in Leyden by John Rose on August 12, 2023
• Draft JEP: Computed Constants by Per-Ake Minborg, Maurizio Cimadamore on August 4, 2023
• Project Leyden: Toward Condensers by Brian Goetz, Mark Reinhold, Paul Sandoz on July 31, 2023
• The Holy Grail of Java Performance - Inside Java Newscast #43 by Nicolai Parlog on March 2, 2023
• Java's Plans for 2023 - Inside Java Newscast #40 by Nicolai Parlog on January 19, 2023

2022

• Selectively Shifting and Constraining Computation by Mark Reinhold on October 14, 2022
• Java Q&A - Inside Java Newscast #30 by Nicolai Parlog, Billy Korando on July 28, 2022
• Project Leyden: Beginnings by Mark Reinhold on May 20, 2022

2020

• Towards OpenJDK 17 by Claes Redestad on December 6, 2020
• Call for Discussion - New Project: Leyden by Mark Reinhold on April 27, 2020