# Understanding update data on canister

**URL:** <https://forum.dfinity.org/t/understanding-update-data-on-canister/4645>\
**Category:** Developers\
**Created:** [June 2, 2021, 4:25am UTC](https://forum.dfinity.org/t/understanding-update-data-on-canister/4645 "2021-06-02T04:25:18Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![blackeagle](https://avatars.discourse-cdn.com/v4/letter/b/85e7bf/32.png) [@blackeagle](https://forum.dfinity.org/u/blackeagle)\
**Post date:** [June 2, 2021, 4:25am UTC](https://forum.dfinity.org/t/understanding-update-data-on-canister/4645/1 "2021-06-02T04:25:18Z")

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Hello everyone,

As I have read in IC documentation, canister can process only one update request at a time, and the completion time for an update is about 1-5 seconds to pass through consensus.  
Assume that I have a list of users, each user has a score, the list is being stored on canister’s memory.  
Then the canister can only update score of 12-60 users per minutes?

I know that this is a very basic question, but please tell me if I misunderstood something.

Thank you!