# Datomic Cloud Query Speed

**URL:** <https://forum.datomic.com/t/datomic-cloud-query-speed/2551>\
**Category:** Troubleshooting\
**Created:** [March 19, 2025, 3:27pm UTC](https://forum.datomic.com/t/datomic-cloud-query-speed/2551 "2025-03-19T15:27:25Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![maniginam](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.datomic.com/maniginam/32/637_2.png) [@maniginam](https://forum.datomic.com/u/maniginam)\
**Post date:** [March 19, 2025, 3:27pm UTC](https://forum.datomic.com/t/datomic-cloud-query-speed/2551/1 "2025-03-19T15:27:25Z")

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We recently went from datomic pro to datomic cloud. The queries that included where-clauses that worked in pro are not working in cloud due to regex, but even the ones that are pulling all of one entity without any where-clauses are incredibly slow. In pro that query to find all took maybe a second or two. In cloud, the same queries are taking well over a minute–sometimes up to 6 minutes.

Is datomic cloud known to be substantially slower than pro? What can I do to decrease the query time?

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**Author:** ![jaret](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.datomic.com/jaret/32/45_2.png) [@jaret](https://forum.datomic.com/u/jaret)\
**Post date:** [March 19, 2025, 4:03pm UTC](https://forum.datomic.com/t/datomic-cloud-query-speed/2551/2 "2025-03-19T16:03:33Z")

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Hi @maniginam,

Can you share more specifics on what you are seeing?

1. How was your Pro System provisioned? Size of instances, caches used, etc?

2. Do you have [query-stats](https://docs.datomic.com/reference/query-stats.html) from a query you have identified as “this used to be faster”?

3. How have you provisioned your Cloud system (size of instances etc)?

4. Can you provide the same query-stats for the same query run on the Cloud system?

In general, both systems should be very close in performance if properly configured and operated. However, Cloud does introduce a network hop with the client api, but that difference should be minor. And if you used client-pro I would suspect very similar.

If you would like to share specifics, but are not comfortable posting them in our public forum you can send in a support case here: [https://support.cognitect.com/hc/en-us/requests/new](https://support.cognitect.com/hc/en-us/requests/new) Or e-mail [support@datomic.com](mailto:support@datomic.com)

Thanks,  
Jaret