# Why is my Cloud Firestore query slow?

DevFeed: [Why is my Cloud Firestore query slow?](<https://devfeed.tech/articles/why-is-my-cloud-firestore-query-slow-16324.md>)

Original publisher: [Read original article](<https://firebase.blog/posts/2019/08/why-is-my-cloud-firestore-query-slow>)

Author: Todd Kerpelman

Published: 2019-08-08T00:00:00Z

Content type: tutorial

Language: en

Sources: [Firebase Blog](<https://devfeed.tech/sources/firebase-blog.md>)

Topics: [Firestore](<https://devfeed.tech/topics/firestore.md>), [data](<https://devfeed.tech/topics/data.md>), [realtime](<https://devfeed.tech/topics/realtime.md>)

Tags: [best-practices](<https://devfeed.tech/tags/best-practices.md>), [data](<https://devfeed.tech/tags/data.md>), [firebase](<https://devfeed.tech/tags/firebase.md>), [firestore](<https://devfeed.tech/tags/firestore.md>), [realtime](<https://devfeed.tech/tags/realtime.md>), [tutorials](<https://devfeed.tech/tags/tutorials.md>)

## AI overview

This tutorial explains why Cloud Firestore queries can appear slow even when the query itself runs quickly. The main causes discussed are transferring large result sets and documents, with suggested fixes including query limits, smaller documents, and separating secondary details into other collections or subcollections.

## Source excerpt

News, tutorials, and updates from the Firebase team.