Low performance Operation Execution Times

Hi all
I hope this is the right place to post.
I have a atlas organization with two projects (stage/prod)
In prod the Operation Execution Times fluctuate between 50ms and 150ms while in staging i have between 2 and 4ms.
they are more or less the same definition
replica set (2 regions for stg and 3 for prod)
stg is m10 and prod is M30
Default Read Concern is Local and Default Write Concern is Majority in both cases
The writes occurs from the same region in stg and prod
in mongosh stg and prod i ran the following
for (var i = 0; i <= 1000; ++i) { db.Test.insertOne({“id”: “Olivia-157.0-89.0-81.0-102.0-0.3-0.1”, “gender”: “F”, “measurements”: “measurements.json”}) }
in stg it run fast
in prod took more than 5 minutes
I’m open to suggestions :slight_smile:
Thank you