Withdrawn: 8371380: [LOOM] The debug agent should avoid enabling VIRTUAL_THREAD_START/END events when possible

[duke]

On Tue, 25 Nov 2025 02:25:02 GMT, Chris Plummer <cjplummer at openjdk.org> wrote:

> Don't enabled VIRTUAL_THREAD_START/END events unless absolutely necessary. Solves performance issues when trying to debug apps that create a lot of virtual threads. Details in first comment.
> 
> With these changes the Skynet benchmark no longer shows any slowdown when launching with debugging enabled or when attaching the debugger.
> 
> Tested with all tier2, tier3, tier5, and tier6 CI testing (with filters to only run svc tests).

This pull request has been closed without being integrated.

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PR: https://git.openjdk.org/jdk/pull/28485