> ## Documentation Index
> Fetch the complete documentation index at: https://docs.basset.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# coreData.changes

> How much a Core Data stack churns between saves, aggregated per second

Watches `NSManagedObjectContext`'s change notifications. Readings arrive on a
fixed timer, aggregating whatever changed in that window.

| | |
| - | - |
| [Delivery](/instruments/metadata) | stream, interval |
| Mechanism | notification |
| [Requires](/instruments/metadata) | iOS 17+, basset 0.1.1+ |

Real output from `basset request get`, captured against a running app:

```
CAPTURED                  ELAPSED  INSTRUMENT

launch 14857918799893053188
2026-08-23T14:55:14.328Z  +0.0s    storage.coreData.changes(managedObjectContext)
├─ occurrenceCount    1
├─ windowNanoseconds  1000291500
└─ insertedCount      500
```


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