Apply for Each is very slow to execute

[RakeshSarangi]

Hi,

I am using GetItems to get records from a Sharepoint List and then using Apply for Each to loop through the records. My observation is that the Flow gets stuck up in Apply for Each and takes 30 mins for looping through 150 records.

Any help is appreciated for improving the performance of the Flow

[v-monli-msft · Accepted solution]

Hi @RakeshSarangi,

If you have too many requests come at the same time, this situation might appear. Please try to add a Delay action to this flow to test if this could help.

Regards,

Mona

[Infiniti33]

Hi,

I am also experiencing a significant slowdown when my flows hit apply to each to loop through records from Get Items. Where does the Delay action get added in?

Thank you

[SteenJakobsen]

You can perform GetItems on 10,000 items in 4 seconds and update all 10,000 items in ❤️ minutes

using Fusion from No-Code Solution.

The Fusion job can be initiated from Flow and you can pass in parameters including Site URL and List name.

Also Fusion automatically persists the version number and the values in Modified, ModifiedBy

Flow takes 1 hour and 10 minutes to complete the same action with maximum paralelims enabled.

- And Flow generates a new version and overwrites Modified & ModifiedBy.

Quite and extension to Flow I think 🙂

[Anonymous]

Hi @RakeshSarangi ,

There are two things potentially going on, one its to minimise the use of Variables in the Flow, they will significantly slow your flow down, especially if you use an apply to each action. This is because the Variable needs to be locked for each iteration.

Secondly, you may find that using the Microsoft Graph / SharePoint API with a $Batch command will run faster, you can feed in all the record changes in JSON in a long string (upto 20 recordss a time) and it will do all the records in one hit, and each hit takes a fraction of a second. My experience with this has been really positive.

https://docs.microsoft.com/en-us/graph/json-batching

[nwstar]

I have a simple flow that queries 1,000 Dataverse records and then loops ("for each") through them. It usually runs in about 1 minute, but sometimes takes an hour or more. Randomly! This is clearly a bug in Power Automate. I've written dozens of .NET apps using foreach on a data set and not once did my code just get hung up right before the loop.

[takolota]

If you’re getting throttling or daily action limit issues & you have flows with loops running conditionals, SharePoint list, or Excel table actions, then you should…

-Use Filter arrays outside the loops to pre-filter based on the condition criteria

-Use SharePoint batch actions: https://powerusers.microsoft.com/t5/Power-Automate-Cookbook/Batch-Update-SharePoint-List-With-Extern...

-Use Excel batch actions: 

https://powerusers.microsoft.com/t5/Power-Automate-Cookbook/Excel-Batch-Create-Update-and-Upsert/td-... 

https://powerusers.microsoft.com/t5/Power-Automate-Cookbook/Excel-Batch-Delete/td-p/1634375