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# suggestedBatchSize

Retrieves the suggested number of changed contact items to include in a batch.

```
var suggestedBatchSize: Int { get }
```

## Discussion

This value is a suggested upper limit for the number of contact items you can pass in the aggregate calls to [`didUpdate(_:)`](/documentation/ContactProvider/ContactItemChangeObserver/didUpdate(_:)) and [`didDelete(_:)`](/documentation/ContactProvider/ContactItemChangeObserver/didDelete(_:)).
Exceeding this limit may result in memory issues.

---

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