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With the support of JDK 21 by Blueriq, you are able to use virtual threads in your application. Virtual threads offer a lightweight alternative to the resource-intensive platform threads that we knew so far, which should allow us to write high throughput applications that better utilize resources.

Since Blueriq supports and compiles against JDK 17, we still rely on the existing platform thread architecture, which also includes a concept called ThreadLocal. It is known that when you use virtual threads and these ThreadLocals, that it will hurt performance (https://youtu.be/WsCJYQDPrrE?t=1895). For this reason, we cannot yet support virtual threads with Blueriq. Once we do compile against JDK 21 (which is planned for release 17, see Java support roadmap), we can take the steps to migrate the ThreadLocals to the virtual threads architecture. Note that this also involves a lot of frameworks that Blueriq relies upon, so we cannot make any guarantees when this migration will be completed.