About Passionate Testing

Welcome to Passionate Testing, the engineering publication from Xceptance.

For over twenty years, our engineering team has worked alongside global e-commerce leaders, enterprise platforms, and technology innovators to push the boundaries of software performance, load testing, and test automation.

What We Write About

• High Performance Java & JVM Internals: Memory footprints, object layouts, garbage collection tuning, cache locality, and JMH microbenchmarking.
• Large-Scale Load & Performance Testing: Protocol-level load testing with XLT (Xceptance LoadTest) and Apache JMeter, modeling realistic user behavior, and diagnosing distributed concurrency bottlenecks.
• Modern Test Automation: Cross-browser test engineering, test reporting, and WCAG accessibility auditing with Neodymium and Selenium.
• E-Commerce Architecture & Payments: Real-world checkout resilience, payment gateway integrations (Apple Pay, 3DS2, credit tokens), and holiday peak preparation.

Open Source & Tools

We believe in sharing research and tooling with the engineering community. Check out our open-source projects on GitHub, or explore consulting and performance engineering services at xceptance.com.