Significant degradation of Thread.sleep with virtual threads in JDK 25 vs JDK 21

Alan Bateman alan.bateman at oracle.com
Thu Nov 27 11:31:53 UTC 2025


On 25/11/2025 16:04, Fredriksson, Christian wrote:
>
> I have tested with latest JDK 24 and do **not** see the issue there, 
> only on JDK 25.
>
> I have attached the output of running that jcmd every 15 seconds when 
> the issue happened on JDK 25.
>
>
Thanks, that rules out a signalling issue. Are you able to test with JDK 
26 EA builds?

-Alan
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