Explore the evolution of web application scalability and the potential impact of Project Loom in this 36-minute conference talk from Spring I/O 2023. Delve into the history of Servlet specification improvements, from blocking I/O to non-blocking I/O and asynchronous APIs. Discover how Project Loom, an OpenJDK initiative, aims to enhance scalability through lightweight concurrency. Using Apache Tomcat as a reference, examine Loom's potential benefits at both container and application levels. Gain insights from experimental data and benchmarks to understand how Loom might improve your web applications' performance. Learn the fundamentals needed to begin your own performance testing and quantify the advantages of Loom for your specific use cases.