Integrated: 8372048: Performance improvement on Linux remote desktop

[Renjith Kannath Pariyangad]

On Tue, 18 Nov 2025 11:27:30 GMT, Renjith Kannath Pariyangad <rkannathpari at openjdk.org> wrote:

> Hi Reviewers,
> 
> Observed these two demon threads are created on class initializing time due to static variable and static block call. Observed [ScreencastHelper.isAvailable()](https://github.com/openjdk/jdk/blob/28d94d6ab4994b844af98c5c227b40b5fb8a72e5/src/java.desktop/unix/classes/sun/awt/X11/XToolkit.java#L1527) from XToolkit.java call is enough to start these demon threads on latest Linux (Gnome version 47 and above). In my observation  some simple workflows not passing through the code where these **Watchers** are required, at the same time threads are running because of the above reason. So moving those into lazy loading will improve loading time and performance.
> 
> Please review and let me know your suggestions.
> 
> Renjith.

This pull request has now been integrated.

Changeset: 0b3df489
Author:    Renjith Kannath Pariyangad <rkannathpari at openjdk.org>
Committer: Alexander Zvegintsev <azvegint at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/0b3df489e9d3b6d876a67793e082b930c17ade3e
Stats:     32 lines in 2 files changed: 25 ins; 6 del; 1 mod

8372048: Performance improvement on Linux remote desktop

Reviewed-by: azvegint, serb

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PR: https://git.openjdk.org/jdk/pull/28369