On Mon, 27 Apr 2026 14:45:53 GMT, Frederic Parain <[email protected]> wrote:
> This patch adds a simple policy to put a limit on field flattening to prevent > instances from becoming too large. It is easy to generate very huge instances > with nested flat values, so huge that the JVM struggles to allocate its > internal data structure to handle such classes. The new policy allocates a > flattening budget to each class, and field flattening in this class stops > when the budget is exhausted. The limit can be tuned with a VM parameter. > > Tested on Mach5 tier1-4 > > --------- > - [X] I confirm that I make this contribution in accordance with the [OpenJDK > Interim AI Policy](https://openjdk.org/legal/ai). This pull request has now been integrated. Changeset: 46aac163 Author: Frederic Parain <[email protected]> URL: https://git.openjdk.org/valhalla/commit/46aac1637b9418557a46c25437c481c1ca79a05a Stats: 179 lines in 7 files changed: 176 ins; 0 del; 3 mod 8383417: [lworld] Implement limitation to the size of instances due to flattening Reviewed-by: aboldtch, phubner ------------- PR: https://git.openjdk.org/valhalla/pull/2372
