Virtual Threads Clearly Explained
Learn how Virtual Threads help achieve high concurrency. You'll also understand the scenarios when Virtual Threads are most beneficial and how they address the limitations of Thread Pools and Platform Threads.
Virtual Threads are a major feature of Java and we introduced in Java 21 as part of Project Loom. They are especially well-suited for building large-scale web applications where:
Very high concurrency is required (hundreds of thousands to even millions of concurrent requests/tasks), and
Many tasks involve blocking operations such as calling remote Web services or microservices, accessing databases or reading from the file system
In short, Virtual Threads shine when there is blocking I/O combined with high concurrency. They use smart and efficient JVM techniques to dramatically improve throughput in these scenarios—and all of that is clearly explained in this lecture.
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