Experiment virtual threads with reactor

[vttranlina]

The current source code is Java 21 and it supports virtual threads,
We can experiment with it with reactor by setting the JVM argument
-Dreactor.schedulers.defaultBoundedElasticOnVirtualThreads=true

Try it on staging, run Gatling performance test, and compare before/after

ref: https://spring.io/blog/2023/10/31/what-new-is-coming-in-reactor-core-3-6-0

[chibenwa]

Cool!

Please read completly virtual thread limitations regarding thread pinning and do an overall report here too.

[hungphan227]

perf test imap 10k - no virtual thread

[hungphan227]

perf test imap 10k - virtual thread enabled

[hungphan227]

perf test result with virtual thread seems to be better but not much (99th: 919 vs 1194). I am not sure that the performance change is due to virtual thread or environment unstability.

[chibenwa]

We likely can PR use of virtual threads in bounded elastic

[Arsnael]

Status on this?

[hungphan227]

Due to the other ticket I am currently doing, the sandbox environment is not available to conduct test. Will be back to this one after sandbox is recovered.

[Arsnael]

Not urgent though

[chibenwa]

Status please?

If nothing happens on that then let's move it to backlog.

[chibenwa]

I opened back this ticket by accident: still very relevant ;-)