Per-Åke Minborg

RT @Jepupdates: JEP 8359894 ("Lazy Constants (Second Preview)") added. See

My talk at Devoxx BE on "Java Performance Update" for JDK24 seems to attract much attention — almost 50K views in the first week alone. #Java Read all about it here:

The #java StableValue JEP has been updated, read all about it here:

For obvious reasons, I am heading in another direction: Thank you for the fish.

RT @Sharat_Chander: .@Devoxx attendees… Don’t miss today’s “Ask the the Architects” AMA at 16:30 in room 8. Connect with @BrianGoetz @PMinborg @stuartmarks @GavinBierman & Alan Bateman. Post your questions in-advance using #AskTheArchtects

RT @biboudis: Project Leyden @PMinborg & @sdeleuze @Devoxx

RT @BrianGoetz: JEP 14: The Tip & Tail Model of Library Development

RT @nipafx: @PMinborg Friday, 10:00 CEST on YouTube: JAVA PERFORMANCE UPDATE with @pminborg How does Java keep getting faster and what does Project Leyden have to do with that? Got questions? Reply here to get them answered!

RT @java: Java 23 is now available! #Java23 #JDK23 #OpenJDK Download Now: Release notes: API Javadoc: Features: Blog:

The trilogy of #java FFM API performance improvements is now complete in Java 24! A while ago, we integrated which improves the performance of MemorySegment::fill This improves performance on all supported Java platforms, in particular on Aarch64.

The train of #java FFM API performance improvements is steamin' ahead: We have recently integrated yet another PR that improves the FFM performance of mismatch detection between segments:

The new #Java FFM API is poised for additional performance improvements in Java 24. We just integrated giving significant performance gains for smaller segments (lower is better):

RT @ammbra1508: JVM Language Summit 2024 gathered top contributors to the #JVM and JVM language ecosystems. The 3-day agenda was packed with sessions on project #Babylon, #Leyden, #Valhalla + many more. Checkout the best of #Java performance from #JVMLS2024 👇

All good things come in threes! It will be so nice to come back to @Devoxx BE and share news about Leyden, Performance improvements, and sneak peeks at two new @java features in the making!

RT @DevoxxUK: Want to explore the potential of Java 22's Foreign Function & Memory API? Check out @pminborg's session & delve into how the API enhances native methods & memory access, maintaining high performance & safety. View talk @

The power of Stable Values & Collections might soon be integrated into Java (first as an internal feature and then hopefully available to all developers). We are likely to see significant performance gains and better abstractions for some coding patterns

Here is the relative performance of StableValue compared to AtomicReference and DoubleCheckedLocking holder. In the benchmark, we sum two values:

See my talk on the new @java 22 Foreign Function and Memory API at @DevoxxUK

RT @ammbra1508: ⚡️ Capturing lightning in a bottle with #ProjectLeyden and @PMinborg #JDK #memoryfootprint #faststartup #DevoxxUK2024

Thank you all who attended my talk on the Java FFM API at #DevoxxUK2024