On Wed, 28 Oct 2015 23:59:59 +0100, "setysvar setys...@gmail.com [firebird-support]" <firebird-support@yahoogroups.com> wrote: > http://tracker.firebirdsql.org/browse/CORE-4601 is a report of a 60-time
> improvement (from half a minute to half a second) with Firebird > 2.5.2/2.5.3 and Jaybird 2.2.5/2.1.6 when changing from blob to varchar, > I guess this could be the same problem as you observe. CORE-4601 is not a bug, it is an improvement request. The described behavior is inherent to the way blobs are handled in the wire protocol of Firebird, and I don't think it is the cause of this problem (it would also - as far as I know - not explain the high CPU use). Mark
