Hi Henry,

> I have an app with Delphi 5 and IBObject 4.5 (an old version).
> With IB_Pump I have very slow performance on Vista (100 times
> slower than on XP Pro)
> When using and enabling TIB_Monitor (with or without setting
> OnMonitorOutputItem) the performance is correct

> Have you any idea on how to get good performance without enabling
> IB_Monitor ?

What version of Firebird? (v1 or v2, classic or superserver).
Are you connecting to the same FB server for both connections?

I know of an issue with FB v1.5 superserver where such transfer
processes will seem to pause at intervals (and can be restarted
by having any sort of activity at all to the same server).
The effects and timing of the pauses are highly variable (seems
to partly depend on row sizes and column types). The dramatic
change you describe seems similar, wondering if perhaps Vista
makes the problem more obvious.

If you are using superserver v1.5 or earlier try classic. I
believe the problem is supposed to be fixed in v2 but I am
in the process of migrating so cannot confirm.

--
Geoff Worboys
Telesis Computing