Java Virtual Threads Explained | Thread Pool vs Virtual Threads Benchmark
Virtual Threads are a major evolution in Java concurrency, introduced with Project Loom and stabilized in Java 21.
In this video, we explain Java Virtual Threads in a simple and practical way and compare them with a traditional thread pool using a real benchmark. You’ll see how Java handles 10,000 blocking tasks and why virtual threads are a better choice for I/O-bound workloads like REST APIs and microservices.
🔍 Topics Covered
What are Virtual Threads in Java?
Platform Threads vs Virtual Threads
How Virtual Threads work internally (carrier threads)
Why blocking calls are no longer expensive
Thread Pool vs Virtual Threads benchmark
Performance comparison and results
When NOT to use virtual threads
Virtual Threads with Spring Boot
Java 21 vs newer Java versions
🧪 Benchmark Summary
Thread Pool execution: ~100 seconds
Virtual Threads execution: ~1 second
Same code, same machine, same workload
👨💻 Who This Video Is For
Java Backend Developers
Spring Boot Developers
Microservices Engineers
Developers preparing for Java interviews
Anyone learning modern Java concurrency
🛠 Tech Stack
Java 21, Java 25
Maven
Spring Boot
Project Loom (Virtual Threads)
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