[Perf] Reuse ElementEventArgs in tree propagation#34134

Merged

PureWeen merged 2 commits intonet11.0from

dev/simonrozsival/reuse-element-eventargs

Mar 30, 2026

Commits on Mar 20, 2026

Reuse ElementEventArgs in OnDescendantAdded/Removed tree propagation

simonrozsival
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Address review: lazy EventArgs allocation + Core naming

simonrozsival
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