Java Virtual Threads Explained | Thread Pool vs Virtual Threads Benchmark

Published: 09 January 2026
on channel: EverythingAboutJava
9,416
5

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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