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

# Tips and Tricks

#### Sort by ID field

The `_id` field contains info about creation timestamp. It means that sorting on an `_id` field is roughly equivalent to sorting by `created_at` field, but works much faster because `_id` field has predefined index.

Hence it is highly recommended to use sort by `_id` field instead of sort by `created_at` field:

<CodeGroup>
  ```bash curl theme={null}
  curl -X GET -d "sort_desc=_id&limit=10" -H "QB-Token: 4d617908bf432bd0a72e2e089ed500e76a2c1a3b" https://api.quickblox.com/data/Message
  ```
</CodeGroup>

#### Skip parameter performance

The `skip` parameter is often expensive because it requires the server to walk from the beginning of the collection to get the offset or skip position before beginning to return result. As offset increases, skip will become slower and more CPU intensive. With larger collections, skip may become IO bound.

Instead of using big value of skip try to improve your query. Maybe you don't need it.