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Sync knowledge articles with review agent instructions

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Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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microsoft/knowledge/performance/keep-event-subscribers-lightweight.md
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@ -17,7 +17,9 @@ Event subscribers run synchronously on the publisher's thread. If a subscriber d
## Best Practice
Keep subscribers small: guard early with inexpensive checks, defer heavy work to a task queue or a background session, and cache results across invocations when the data is stable.
Keep subscribers small: guard early with inexpensive checks on the publisher record before doing any database work, defer heavy work to a task queue or a background session, and cache results across invocations when the data is stable. In hot events, a cheap `Type`/`Status`/`IsTemporary` exit before a `Get` or `FindFirst` is often the difference between a rare lookup and an N+1 query across every posted line.
See sample: `keep-event-subscribers-lightweight.good.al`.
## Anti Pattern