On Fri, Mar 2, 2012 at 1:02 PM, <michael.vancann...@wisa.be> wrote: > > > On Fri, 2 Mar 2012, Marcos Douglas wrote: > >> On Wed, Feb 29, 2012 at 10:38 PM, Marcos Douglas <m...@delfire.net> wrote: >>> >>> Hi, >>> >>> The TField class have the FValueBuffer: Pointer attribute and have >>> also SetData(Buffer: Pointer,...) method that all T***Field subclasses >>> use to set themselves. >>> The methods AsInteger, AsString, etc use FValueBuffer to convert in an >>> especific type. So, FValueBuffer could be anything. >>> >>> My question is: >>> What would be the difference in performance if FValueBuffer were a >>> Variant type? >>> >>> Marcos Douglas >> >> >> Nobody knows? >> >> I need implements a similar structure but I need know if the use of >> Variant have very cost. > > > It has a cost. > > The reason for using a buffer in tdataset is that a record's data normally > is located in one continuous buffer, from which a value is picked from the > right spot (including strings) You can't have that with variants.
Hm... right. So, if I will have a class like a TParam, that have FValue: Variant attribute, Would you change the implementation to not use Variant? Marcos Douglas _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal