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Description
This is reported in https://issues.couchbase.com/browse/CBSE-13748 that opening the upgraded database could take 30 seconds. I have tested with cblite tool built on the lithium branch and it took ~10 - 14 seconds to open on my Macbook M1.
Noted that the database provided in the CBSE ticket is an already upgraded database from 2.8 to 3.0.2.
The next step we should try is to do time profiling.