Hi Helen,

>>>TIBODataset has two column layers: one the VCL's persistent
>>>fields and the other the TIB_Columns of the InternalDataset. The
>>>trick is: Don't use persistent fields!

I repeated the benchmarks and the results are almost the same, with
or without persistent fields. Nevertheless persistent fields are
useful when you don't want grids to auto create all the fields,
instead being me who filter the ones I want to be seen, which for me
is a must.

Best regards,
Carlos Macao