[jira] [Created] (WICKET-6790) CLONE - Separate model, behaviors and metadata into separate fields

["Alexander (Jira)" <ji...@apache.org>]

Alexander created WICKET-6790:
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             Summary: CLONE - Separate model, behaviors and metadata into separate fields
                 Key: WICKET-6790
                 URL: https://issues.apache.org/jira/browse/WICKET-6790
             Project: Wicket
          Issue Type: Improvement
          Components: wicket-core
    Affects Versions: 9.0.0-M5
            Reporter: Alexander


While investigating performance issues with metadata in WICKET-6771, I discovered that significant performance gains can be achieved by separating models, behaviors, and metadata into separate fields.

Currently, all three types of data are stored in a single, untyped field {{Component.data}}. The idea is to minimize memory overhead by creating as few objects as possible.

If a model or a single behavior or metadata is added, {{data}} stores only a reference to the object. When additional data is added, the reference becomes an array.

This is the most memory-efficient way to store these three types of data. But it comes with a cost: code to manipulate that data structure is complex and not as efficient because it has to take all possible combinations of data into account.

I suggest introducing 3 separate fields for the 3 types of data, trading a little bit of memory for reduced complexity and performance gains.



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