https://javapro-en.svenruppert.com/tags/java-performance/Recent content in Java Performance on JAVAPRO InternationalHugoen-USTue, 23 Jun 2026 07:00:02 +0000https://javapro-en.svenruppert.com/1brc-the-first-80-of-the-journey/Tue, 23 Jun 2026 07:00:02 +0000https://javapro-en.svenruppert.com/1brc-the-first-80-of-the-journey/<p>The <a href="https://www.morling.dev/blog/one-billion-row-challenge/">One Billion Row Challenge (1BRC)</a> started as a way to kill time during the 2023/2024 holidays, asking a simple question: How fast can Java crunch temperature values from a text file and calculate the min, mean, and max per weather station? The catch is that the file contains one billion rows, totaling approximately 13.8 GB.</p> <p>Thomas Wuerthinger, Quan Anh Mai, and Alfonso Peterssen achieved the best result of 1.5 seconds on 8 cores. That was insanely and unexpectedly fast. But when you take a closer look at the code, you will see that it is beyond your daily dose of Java. It is a complex, single-use-case-oriented implementation, skipping safety features, and most of the tunings applied cannot be easily reused.</p>https://javapro-en.svenruppert.com/hitchhikers-guide-to-java-performance/Mon, 07 Apr 2025 11:43:20 +0000https://javapro-en.svenruppert.com/hitchhikers-guide-to-java-performance/<h2 id="the-past-the-present-and-the-future">The Past, The Present and The Future</h2> <p>Over the last 30 years, Java has evolved from an exotic “write once, run anywhere” language to one of the dominant platforms for software development worldwide. In the early years, Java was justifiably considered slow compared to languages such as C/C++, which was mainly due to the initial interpreter approach. However, the last three decades have shown that the VM concept with HotSpot’s adaptive optimization is clearly the superior approach.<br> <strong>by Ingo Düppe</strong></p>