Hi,

As I had some time today, I installed an older version of PLSQLDev (11.0.6) and I tried the export. It is 10x faster (same table, same database, same computer).
Code
00:00:05.801 TOracleQuery $0C042FC0 End  (100 records processed)
             Duration = 2.032
00:00:05.803 TOracleQuery $0C042FC0 Start Query.Next for up to 100 records
00:00:05.805 TOracleQuery $0C042FC0 End  (100 records processed)
             Duration = 0
00:00:05.806 TOracleQuery $0C042FC0 Start Query.Next for up to 100 records
00:00:05.807 TOracleQuery $0C042FC0 End  (100 records processed)
             Duration = 0
00:00:05.808 TOracleQuery $0C042FC0 Start Query.Next for up to 100 records
00:00:05.809 TOracleQuery $0C042FC0 End  (100 records processed)
             Duration = 0
00:00:05.811 TOracleQuery $0C042FC0 Start Query.Next for up to 100 records
00:00:05.812 TOracleQuery $0C042FC0 End  (100 records processed)
             Duration = 0

.......................................

00:02:07.499 TOracleQuery $0C043C20 Start Query.Next for up to 100 records
00:02:07.500 TOracleQuery $0C043C20 End  (100 records processed)
             Duration = 0
00:02:07.675 TOracleQuery $0C043C20 Start Query.Next for up to 100 records
00:02:07.677 TOracleQuery $0C043C20 End  (100 records processed)
             Duration = 0
00:02:07.849 TOracleQuery $0C043C20 Start Query.Next for up to 100 records
00:02:07.850 TOracleQuery $0C043C20 End  (100 records processed)
             Duration = 0
00:02:08.023 TOracleQuery $0C043C20 Start Query.Next for up to 100 records
00:02:08.025 TOracleQuery $0C043C20 End  (100 records processed)
             Duration = 0
00:02:08.199 TOracleQuery $0C043C20 Start Query.Next for up to 100 records
00:02:08.201 TOracleQuery $0C043C20 End  (100 records processed)
             Duration = 0
00:02:08.348 TOracleQuery $0C043C20 Start Query.Next for up to 100 records
00:02:08.350 TOracleQuery $0C043C20 End  (66 records processed)
             Duration = 0
00:02:08.444 TOracleQuery Query Start Query.Execute

Did you tried the "Table export" with the latest version. Is the export ok on your side?

Regards!