Re: automatic Streamer

On Tue, 7 Jun 2005, Rene Brun wrote:

> Hi Gero,
>
> If you have consecutive data members of the same type, the automatic
> Streamer is faster.
> In addition, the automatic schema evolution is only available with
> the automatic Streamers.
> We STRONGLY recommend to use the automatic Streamers.

Hi Rene,
thanks for explanation, just for being sure that I understand you correctly:
By 'consecutive data members of the same type' you mean that class data members are ordered by their type, e.g.

class MyClass : public TObject{
  Float_t fFloat1;
  Float_t fFloat2;
  Int_t fInt;

  ClassDef(MyClass)
}

is (with 'new' Streamer) better than

class MyClass : public TObject{
  Float_t fFloat1;
  Int_t fInt;
  Float_t fFloat2;

  ClassDef(MyClass)
}

Am I right?

Cheers

        Gero

> On Tue, 7 Jun 2005, Gero Flucke wrote:
>
> > Hi,
> > is there a general rule which automatically generated streamer mechansim
> > is faster:
> > The (very) old one or the "new" introduced in ROOT 3.0 and activated if I
> > have in my LinkDef.h
> >
> > #pragma link C++ class MyClass+;
> >
> > with the '+' in the end.
> >
> > Cheers
> >
> > Gero

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