matijamikac wrote:

> I am looking for free or low-cost component solution for using
> Firebird from Delphi.
>
> Until now I used IBX with standard Delphi visual components (e.g. DBGrid).
> But, when having large queries, programs may work slower, even stop
> responding because dbgrid/TIBQueries are fully populated.
> Is there anything I could do to prevent it?
>
> I know I could use my own grids and then use limited select (select
> first etc.)... Anything smarter?
>

Don't use grids. You also could consider placing a
clientdataset/dataprovider between your query component and the
datasource component. Fetch data on demand.
There are plenty of free or low-cost data-access components available
for Firebird: UIB (free), ZEOS (free), IB Objects (low-cost or free
under trustware licence), ...