Special thanks you Tim.
We have taken export expdp backup from prod database (primary database- Data Guard).
1.) Import impdp is very slow 10GB/Hrs on staging database (Data Guard – MAXIMUM AVAILBILITY)
Since Server configuration, database version and configuration, operating system everything are same as production. No blocking, locking or waiting sessions
2.)import impdp is fast 90GB/Hrs on Test standalone database and this test database is running in NOARCHIVE LOG mode with oracle standard version after that no more difference.
Note: CPU,Memory,network and disk I/O are look normal while importing on both databases.
I am beating my head but not getting anything why that much difference on import.