[jdk21u-dev] RFR: 8353175: Eliminate double iteration of stream in FieldDescriptor reinitialization [v2]

[duke]

On Mon, 3 Nov 2025 12:15:53 GMT, Radim Vansa <rvansa at openjdk.org> wrote:

>> This backport is a partial fix for a performance regression and prerequisite for backport of https://github.com/openjdk/jdk/pull/24847 (will be done through https://github.com/rvansa/jdk21u-dev/tree/refs/heads/rvansa/backport-8352075)
>> 
>> The backport was not clean; a notable new change is in `reflectionUtils.hpp` (later JDK versions remove the affected class) - I am adding `friend class FieldStream` to `InstanceKlass` to accomodate for this.
>> 
>> Backport-of: f169fc5a99ee2b485e156c043134ab76b7e5ebd9
>
> Radim Vansa has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:
> 
>  - Merge remote-tracking branch 'origin/master' into backport-8353175
>  - Backport f169fc5a99ee2b485e156c043134ab76b7e5ebd9

@rvansa 
Your change (at version bd71655aa5f4a39cf7c79e82f4455e2ce2dc12e0) is now ready to be sponsored by a Committer.

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

PR Comment: https://git.openjdk.org/jdk21u-dev/pull/2010#issuecomment-3601903487