Hello Fabiano, Did you find a solution to the reports running slower with each successive run? I am having a similar problem that started when I upgraded from Firebird version 2.1 to version 2.5. My SQL queries run consistently fast with Firebird 2.1, but when using Firebird 2.5, the query is as fast as 2.1 only for the first run. Then each successive run of the query with Firebird 2.5 takes longer than the previous run. Disconnecting and reconnecting to the database will cause the query to run in the expected time for the first run again, but then each run continues to slow down again until disconnection/reconnecting. Please see my post to the firebird-support mail list on October 24, 2013 titled "Query Performance Problem after Upgrading from Firebird 2.1 to 2.5". No one has responded to my issue. The only update that I have is I have also tried the Firebird Jaybird 2.2.3 JDBC driver and have the same problem with Firebird 2.5 but not 2.1.
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