Latest updates for Jvm Performance

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Recent items include:

  • How to Read a Flame Graph: A Practical Profiling Guide for JVM Developers
  • How the JVM Decides What to Compile: Inside the JIT Tier System and Profiling Pipeline
  • How to Read a Flame Graph: A Practical Profiling Guide for JVM Developers

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javacodegeeks.com /1 month ago

How to Read a Flame Graph: A Practical Profiling Guide for JVM Developers

Stop guessing where your Java app is spending its time. Here is everything you need to go from zero to actionable insight with async-profiler. You have a Java service that is slowe...

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javacodegeeks.com /1 week ago

How the JVM Decides What to Compile: Inside the JIT Tier System and Profiling Pipeline

A conceptual walkthrough of C1, C2, tiered compilation, and why the JVM’s optimizer knows more about your code than you do. Java is often described as a compiled language and an in...

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javacodegeeks.com /1 month ago

How to Read a Flame Graph: A Practical Profiling Guide for JVM Developers

async-profiler demystified — learn to spot the hot frames, understand the stack, and fix what actually matters. Why Flame Graphs Beat Thread Dumps Let’s be direct: if your Java ser...

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javacodegeeks.com /2 weeks ago

Stop Using Virtual Threads for Everything: Performance Lessons Learned

When JEP 444 landed in Java 21 in September 2023, the reaction across the Java community was unusually enthusiastic. Virtual threads promised to solve one of the oldest pain points...

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feeds.feedblitz.com /1 month ago

Java Weekly, Issue 650

All about performance in Java this week. The post Java Weekly, Issue 650 first appeared on Baeldung.       

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dzone.com /1 day ago

Differential Flamegraphs in Java in Jeffrey Microscope

In the first article, we got started with Jeffrey Microscope and learned to read a single flamegraph — the timeseries, search, tooltips, and the allocation and wall-clock variants....

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javacodegeeks.com /1 month 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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dzone.com /1 month ago

A Spring Boot App With Half the Startup Time

The MovieManager project has been updated to use JDK 25 and the AOT cache from project Leyden. Project Leyden is part of the OpenJDK project and provides cached linking and cached...

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javacodegeeks.com /1 month ago

ThreadLocal Is a Memory Leak Waiting to Happen With Virtual Threads — Here’s the Proof

ThreadLocal was designed for a world of 200 pooled platform threads living for the life of an application. Virtual threads create one fresh thread per task and never reuse them. Th...

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javacodegeeks.com /1 month 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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javacodegeeks.com /1 month ago

Virtual Thread Pinning: The Silent Performance Killer in Your Codebase

Virtual threads promise to make blocking I/O cheap. And they do — as long as they can actually unmount from their carrier when they block. The problem is that synchronized blocks p...

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javacodegeeks.com /3 weeks ago

ZGC vs G1GC in Java 26: Which GC Should You Actually Use?

Every time a new Java release drops, the question surfaces again in Slack channels and pull-request threads alike: “Are we still on G1? Should we switch to ZGC?” With Java 26 landi...

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habr.com /1 month 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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infoq.com /1 month ago

Presentation: Practical Performance Tuning for Serverless Java on AWS

AWS Hero Vadym Kazulkin explains how to overcome Java’s enterprise hurdle on AWS Lambda: cold starts and memory footprints. He shares a technical deep dive into performance tuning,...

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habr.com /1 month 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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infoq.com /2 weeks ago

Eliya 25 Brings a JVM-Level Diagnostic Profile to OpenJDK 25 LTS

Asymm Systems has released Eliya 25.0.3, an OpenJDK 25 LTS distribution aimed at improving production diagnostics in Java environments. It consolidates several HotSpot features int...

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dzone.com /2 days ago

Jeffrey Microscope for Generating Flame Graphs in Java

Java Flight Recorder (JFR) captures an enormous amount of detail about what your application is doing — but raw JFR files are only as useful as the tools you have to explore them....

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dev.to /1 month 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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javacodegeeks.com /1 month ago

Records in Production: Where They Shine and Where They Silently Fail

Records are one of the most genuinely useful additions to modern Java. They eliminate boilerplate, communicate immutability at the type-system level, and compose beautifully with s...

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javacodegeeks.com /1 month 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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habr.com /1 month ago

JDK 27 Compact Object Headers: как сбросить до 30% кучи без кроссфита и жестких диет

Каждый Java-объект в HotSpot начинается со служебного заголовка размером 12 байт. В JDK 27 по умолчанию он сжимается до 8 — это JEP 534, финальный шаг внедрения Compact Object Head...

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javacodegeeks.com /1 month ago

Java Virtual Threads Without Pinning

Virtual Threads, introduced as part of Project Loom, provide a lightweight concurrency model that enables Java applications to handle millions of concurrent tasks efficiently. Whil...

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javacodegeeks.com /1 month ago

Lazy Constants (JEP 531): JIT’s Best Friend You Haven’t Met

How ofLazy() unlocks constant-folding without static final, why it finally replaces double-checked locking, and what the numbers look like in practice. Every Java developer knows t...

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javacodegeeks.com /1 week ago

Understanding Garbage Collection Pauses: Why Stop-the-World Still Happens and What the JVM Is Actually Doing

A conceptual guide to safepoints, GC roots, and why even modern collectors like ZGC and Shenandoah cannot always avoid pausing your application. “Stop-the-world” sounds like a reli...

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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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