Prepare for what "Loom"s ahead
summary
Demo shows a normal cached thread pool hits OOM at 16,384 platform threads while virtual threads create millions, reportedly 23 million virtual threads in 16 GB RAM and thread creation is ~30× faster. Code examples use Thread.startVirtualThread and Executors.newVirtualThreadPerTaskExecutor (auto-closeable). Loom runs virtual threads on ForkJoin carrier threads, swaps out blocked virtual threads, and uses managed blockers for native waits; caveats include synchronized/monitor issues, bias-locking changes, and expensive thread-locals and IO buffer objects.
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chapters (12)
- 0:00Start
- 0:31Why Do We Need this Project Loom
- 1:45Cache Thread Pool
- 12:20Virtual Threads
- 12:53Carrier Threads
- 14:12Green Threads
- 16:48Start Virtual Thread
- 18:10Create Virtual Threads
- 18:41Polymorphic Builder
- 19:52Executive Service
- 22:09Preview Release
- 22:50Experimental Features
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