Helidon on Loom
summary
Helidon MP demo builds a blocking JAX-RS service with a slow endpoint that sleeps 5s sleep and a fast in-memory endpoint, runs it on a 10-thread pool and shows the classic starvation problem (fast requests time out while 10 slow requests block threads). Switching the JVM to Project Loom (Java 18 early-access) and using Executors.virtualThreadExecutor() removes blocking of OS threads and the same app hits about 20,000 req/s (reactive variant reached ~40–50k req/s in the demo).
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chapters (11)
- 0:00Start
- 0:43Introduction
- 1:31Project Loom
- 4:14Virtual Threads
- 7:13Configuration
- 8:07Use Case
- 12:03Slow Request
- 23:54Enable Preview
- 24:29What Would Be Suggested Default Halogen Flavor To Go with once Project Loom Comes to a Stable Release
- 25:20When Will Loon Be Available
- 25:56Conclusion
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