On Fri, 16 Dec 2022 15:20:14 GMT, Ajit Ghaisas <aghai...@openjdk.org> wrote:

> The nature of data plays an important part in rendering performance as noted 
> in the comment made on 
> [JDK-8288948](https://bugs.openjdk.org/browse/JDK-8288948) -
> https://bugs.openjdk.org/browse/JDK-8288948?focusedCommentId=14504772&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-14504772
> 
> Although the fix [JDK-8288948](https://bugs.openjdk.org/browse/JDK-8288948) 
> is logical, it seems to have an adverse impact on SwingMark test numbers 
> especially on aarch64.
> 
> The SwingMark tests closely depict the UI operations in real-world 
> applications as compared to the J2DBench and RenderPerfTest tests. Hence, it 
> is decided to revert the regression causing commits 
> [JDK-8288948](https://bugs.openjdk.org/browse/JDK-8288948) (and dependent 
> [JDK-8291266](https://bugs.openjdk.org/browse/JDK-8291266)).
> 
> Metal rendering pipeline performance numbers before and after this PR are 
> attached to the JBS.
> 
> Note : The fix for [JDK-8291266](https://bugs.openjdk.org/browse/JDK-8291266) 
> has a good regression test - DrawPrimitivesTest.java. It passes even after 
> reverting the said changes. This test will be added back once this PR is 
> committed.

This pull request has now been integrated.

Changeset: 3b7970ca
Author:    Ajit Ghaisas <aghai...@openjdk.org>
URL:       
https://git.openjdk.org/jdk20/commit/3b7970cab39a67eabcde331822f0432f71d9186b
Stats:     406 lines in 5 files changed: 27 ins; 302 del; 77 mod

8298217: Regressions 30-110% in SwingMark on MacOS, more so on aarch64

Reviewed-by: avu, prr, jdv

-------------

PR: https://git.openjdk.org/jdk20/pull/47

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