Krakow, Poland, 31 May - 2 June 2023

Micro Benchmarking - The Art of Realizing One is Wrong
Conference (BEGINNER level)
Room 4B
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The internet is full of micro benchmarks explaining the world to beginners. Everyone able to use JMH is trying to explain the world, but only a few do it right. Most benchmarks are either entirely wrong or draw the wrong conclusions.


Benchmarking is an art, not because it should look good, but because it has to be correct. Drawing the wrong conclusions can ruin a project, or at least cause a lot of effort without any results. Not to mention, it can spread a message that others will follow blindly for a long time.

This talk introduces you to the art of microbenchmarking, the approach, the do's and don'ts, the questions you have to ask, and how to draw the right conclusions. At the end of the talk, you might realize that you don't need microbenchmarks at all.

We will use JMH, but start with something more naive.

René Schwietzke
Xceptance GmbH

René Schwietzke is the Managing Director of Xceptance, based in Germany and the US. As co-founder, he has played a major role in shaping the company’s profile, including the continuous evaluation and development of their test tools and services.

Almost two decades ago, René started with Java version 1.0 and has since then gained extensive experience in performance tuning and performance measurements. Working for various e-commerce and quality assurance companies, he became an expert in performance testing and tuning large-scale applications.

René holds a Master’s degree in Computer Science and likes to share his knowledge by giving university lectures. He is a regular speaker at international software development conferences and gives training talks on Java, GC and memory management, as well as quality assurance and testing.

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Venue address

ICE Krakow, ul. Marii Konopnickiej 17


+48 691 793 877


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