https://dplabs.tech/tags/project-loom/ Recent content in Project-Loom on dplabs — Software Engineering & Technology Consultancy Hugo en-us Mon, 04 Nov 2024 00:00:00 +0000 https://dplabs.tech/blog/virtual-threads-java-21/ Mon, 04 Nov 2024 00:00:00 +0000 https://dplabs.tech/blog/virtual-threads-java-21/ <p>Virtual threads were the most anticipated Java feature in years. Project Loom&rsquo;s promise was simple: write blocking code that scales like non-blocking code. Java 21 delivered them as a finalized, production-ready feature. They work. The caveats matter.</p> <h2 id="the-problem-virtual-threads-solve">The Problem Virtual Threads Solve</h2> <p>Traditional Java concurrency has a fundamental constraint: <strong>platform threads are expensive</strong>. Each platform thread maps 1:1 to an OS thread. OS threads consume roughly 1MB of stack space by default and are expensive to create and context-switch.</p>