What is the best way to do a mass field calculate on branch versioned data?

[MDB_GIS]

I added a new field to a dataset and needed to field calculate about 20k features. I started the calculation about 30 minutes ago and it is still going. Any way to speed this up?

[SeyiO]

Hello @MDB_GIS 
Here are a couple of things I would suggest

• Run the calculation via the feature service, not the database.
• Try to close the attribute table and disable layer drawing during this operation. Leaving these options running contribute can to the performance issue
• Check your internet connection for any network latency. (VPN etc.)
• If the service has validation rules and attribute rules each update triggers extra checks. You can temporarily disable the rules (if allowed) for bulk updates
• You can also consider running the operation in chunks (e.g. 5000 at a time) or using python.