Latest updates for Jvm Performance

Fresh curated links around JVM Performance are collected here so marketers can spot useful updates and turn timely ideas into posts faster.

Recent items include:

  • Java 21 vs Java 25 LTS: The Migration Decision Framework Teams Are Avoiding
  • The Lies Your Microbenchmarks Tell You: A JMH Field Guide for Backend Engineers
  • Compact Object Headers: The Invisible JDK 25 FeatureWith the Biggest Memory Impact

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javacodegeeks.com /1 month ago

Java 21 vs Java 25 LTS: The Migration Decision Framework Teams Are Avoiding

Two LTS releases now coexist. Virtual thread pinning is fixed. Memory is down 22%. Startup is faster. The gap is real — and it keeps growing. Why Two LTS Releases Now Overlap For y...

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javacodegeeks.com /5 days ago

The Lies Your Microbenchmarks Tell You: A JMH Field Guide for Backend Engineers

JMH is powerful, but deceptively easy to misuse. Here are the five pitfalls that silently corrupt your results — and exactly how to fix them. If you have spent any time optimising...

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javacodegeeks.com /1 month ago

Compact Object Headers: The Invisible JDK 25 FeatureWith the Biggest Memory Impact

How four saved bytes per object can quietly transform your entire heap — and why you don’t have to change a single line of code. Every so often, the Java platform ships a change th...

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javacodegeeks.com /1 month ago

The JVM Garbage Collector Decision in 2026: G1 vs ZGC vs Shenandoah for Real Workloads

ZGC and Shenandoah have both gone generational. G1 picked up meaningful JDK 25 improvements. Most teams still default to G1 without ever checking whether that is actually the right...

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javacodegeeks.com /1 day ago

Reading JVM Safepoint Logs Without Going Mad: A Practical Stop-the-World Diagnosis Guide

JFR and async-profiler guides are everywhere. Safepoint logs — the raw output that tells you exactly why your JVM froze — are almost universally a footnote. This is the guide that...

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dzone.com /1 month ago

Optimizing Java Back-End Performance Profiling and Best Practices

The dashboard turned red at weekday. Our order processing API latency jumped from fifty milliseconds to five seconds. Customer support tickets flooded in. Users reported timeouts d...

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javacodegeeks.com /1 month ago

The Object Allocation Tax: Why Your Java Service Is 40% GC and How the JIT’s Escape Analysis Both Helps and Misleads You

A ground-level look at how HotSpot C2 decides between scalar replacement and heap allocation, the everyday patterns that silently defeat it, and why measuring allocation rate — not...

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feeds.feedblitz.com /1 month ago

Ahead-of-Time Class Loading & Linking

JEP 514 and JEP 515 are both part of the OpenJDK Project Leyden effort to improve Java startup and warmup performance. Learn how they work together. The post Ahead-of-Time Class L...

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habr.com /1 week ago

Java нас обманывает: скрытая цена чистого кода

Все сейчас пишут красивый, современный код: стримы, record DTO, функциональные цепочки. Применяют лучшие практики и никаких мутабельных аккумуляторов и ручных циклов.А потом код на...

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javacodegeeks.com /3 weeks ago

Virtual Threads Two Years In: Production War Stories, the Pinning Edge Cases, and What JDK 25 Fixed

Java 21 shipped virtual threads in September 2023. Two-plus years of production data later, the picture is more nuanced than the launch hype suggested. Teams at Netflix hit real de...

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habr.com /4 days ago

[Перевод] Java — быстрая. Ваш код может таким не быть

Есть такие анти‑паттерны, которые выглядят нормально и даже проходят код‑ревью, но тихо убивают производительность в горячих местах: - Конкатенация строк в циклах- String.format()...

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javacodegeeks.com /1 month ago

eBPF for Java Developers: What It Is, Why It’s Revolutionizing Observability, and How It Affects Your JVM Profiling

The technology reshaping how async-profiler and JFR see your code — explained without the kernel jargon. If you have spent any time fine-tuning a Java service in production, you ha...

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javacodegeeks.com /1 month ago

GraalVM Native Image vs Project Leyden: Two Answers to the Same Cold-Start Problem

Leyden’s AOT approach is fundamentally different from GraalVM’s closed-world assumption. Here is what architects actually need to know to choose the right path — and why the answer...

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javacodegeeks.com /1 month ago

Kotlin 2.x vs Java 21+The Language Choice for New JVM Projects

The K2 compiler shipped. Multiplatform went stable. Java landed records, pattern matching, and virtual threads. The gap genuinely narrowed — and that deserves an honest conversatio...

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dev.to /1 week ago

Past the JVM

Learning Java got me thinking how exactly does things word under the hood.. I'm not talking about Java in Particular I'm mentioning programming in General how does a command I Writ...

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infoq.com /1 month ago

Podcast: A Java Performance Quest: Taming Unsafe Code, Embracing Idiomatic Style & Debugging the Linux Kernel

In this podcast, Jaromir Hamala, a seasoned Java engineer specialising in high-throughput data systems, shares his thoughts on how developers can tackle high-performance software d...

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javacodegeeks.com /3 weeks ago

Go 1.24 vs Java 25 for Microservices: An Updated Honest Benchmark in 2026

Most Go vs Java comparisons you find online predate virtual threads, generational ZGC, and Go’s Swiss Tables. This is the 2026 version — specific, sourced, and organized by the met...

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javacodegeeks.com /1 day ago

String Deduplication Is On By Default in G1 — And Most Developers Don’t Know What It Does

A granular look at what the JVM is quietly doing with your strings at the native level, when that work genuinely saves you memory, and when it simply burns CPU for nothing. 1. Wait...

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javacodegeeks.com /1 month ago

Virtual Threads One Year in Production: What Teams Got Wrong and What Actually Improved

Project Loom shipped in Java 21 in September 2023. Two-plus years of real production data — including Netflix’s deadlock post-mortem, thread-local memory explosions, and framework...

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dzone.com /1 month ago

Multithreading in Modern Java: Advanced Benefits and Best Practices

Multithreading has always been one of core strengths of Java over years. From the early days of the JVM, Java was designed with built-in support for concurrent programming. But for...

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dzone.com /1 month ago

Java ProcessBuilder: Deadlocks, Zombies, and the 64 KB Wall

Recently at IBM Software Labs, I worked on a task that forced me to understand something many Java developers rarely think about — how Java interacts with the operating system. Mos...

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javacodegeeks.com /1 month ago

Java’s Memory Model Is Not What You Think: The Gap Between the JMM Spec and the JIT’s Actual Guarantees

The Java Memory Model is formally specified. The JIT implements a superset of that spec in ways the spec permits but most developers never encounter — until something breaks in pro...

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javacodegeeks.com /2 weeks ago

Go’s Concurrency Model vs. Java Virtual Threads: A Practical Comparison

Java 21 changed the concurrency story — but how close is it really to Go’s goroutines? Side-by-side code, real benchmarks, and honest trade-offs. For years, Go’s concurrency model...

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infoq.com /5 days ago

OpenJDK News Roundup: Vector API, Compact Object Headers and G1GC as Default in JDK 27

There was a flurry of activity in the OpenJDK ecosystem during the week of May 18th, 2026, highlighting three JEPs elevated from Proposed to Target to Targeted and three JEPs eleva...

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Sources covering Jvm Performance

feeds.dzone.com

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dev.to

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feed.infoq.com

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feeds.feedblitz.com

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habr.com

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javacodegeeks.com

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