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

Alan Bateman alan.bateman at oracle.com
Fri Dec 12 14:59:30 UTC 2025


On 09/12/2025 16:19, Fredriksson, Christian wrote:
> Hi,
>
> I have now tested JDK 26 (specifically image openjdk:26-ea-jdk, pushed 
> to docker hub 4 days ago).
> I do **not** see the issue there.
>
> When is next patch release for JDK 25? And I can verify that also.
>
Thanks for confirming. JDK-8370887 [1] currently lists the backports as 
fixed in 25.0.3, which I think is April 2026, about a month after JDK 26.

-Alan

[1] https://bugs.openjdk.org/browse/JDK-8370887
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