fix: make Behavior Event matching faster #2069
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Previously, every Behavior Event required filtering all registered behaviors to find matches.
Now, we have a Behavior Index that pre-categorizes Behaviors by their
onpattern:global: Behaviors withon: '*'namespaced: Behaviors with patterns likeon: 'select.*'exact: Behaviors with patterns likeon: 'insert.text'Performing a Behavior Event now does O(1) map lookups instead of filtering, then merges and sorts the results to preserve priority order. The merging and sorting still allocates and iterates arrays, albeit a lot smaller.
In the case of Behavior addition and removal, the index is marked as stale and then it is lazily rebuilt when the next Behavior Event is triggered. This mimics the previous caching Behavior sort order.