Johannes Bechberger
9,610 viewsWriting a Profiler in 240 Lines of Pure Java
How to develop a tiny Java profiler, that can output flame graphs, in just 240 lines of pure Java, making it easy for anyone to understand.
Johannes Bechberger
55 articles
356,113 viewsJohannes Bechberger
9,610 views
14,020 viewsBook review - Practical Design Patterns for Java Developers
Ever wondered why you need design patterns and how to apply them? Miroslav Wengner's book has you covered.
Johannes Bechberger
4,475 viewsValidating Java Profiling APIs
AsyncGetCallTrace is the base of many profilers, but how can we test it automatically to make sure it's correct? I'll explore a layered …
Johannes Bechberger
6,929 viewsDo you trust profilers? I once did too!
Do you trust profilers? I once did too. Here I describe why you should take the results of profilers with a grain of salt.
6,189 viewsFoojay Podcast #14: Debugging Tools and Skills for Fun and Profit
Let's talk about debugging and observability. We work with debugging all the time, but how well do we know this common practice?
Johannes Bechberger
5,447 viewsJFR Timestamps and System.nanoTime Foojay.io
Did you ever wonder whether JFR timestamps use the same time source as System.nanoTime? Come down the rabbit hole with me!
Johannes Bechberger
8,954 viewsUsing Firefox Profiler beyond the web
Ever wondered how to use Firefox Profiler to view your own profiling data? This article gives you the foundations!
Johannes Bechberger
4,399 viewsFirefox Profiler Beyond the Web: IntelliJ plugin for JFR
Ever wanted to profile your application directly from your IDE? Here comes the Java JFR Profiler plugin, an open-source plugin for IntelliJ!
Johannes Bechberger
8,018 viewsAsyncGetStackTrace: A better Stack Trace API for the JVM
An introduction into GetStackTrace, AsyncGetCallTrace, and the history and specification of AsyncGetStackTrace.
Johannes Bechberger
6,411 viewsWriting a Profiler from Scratch: The Profiling Loop
How do profilers like async-profiler work? How to write your own? This is the second part, covering wall-clock profiling.