Hi Mikhail,
Thanks for the info.
If my FunctionQuery accesses stored fields like that:
public float floatVal(int docNum) {
Document doc = null;
try { doc = reader.document(docNum); } catch (Exception e) {}
return getSimilarityScore(doc);
}
Is it still the same case? Is there a faster way to access document info?
Cheers,
John
On Thu, Jan 17, 2013 at 6:40 PM, Mikhail Khludnev <
mkhlud...@griddynamics.com> wrote:
> Hello John,
>
> > getting all the documents and analyzing their result fields?
>
> is almost not ever possible. Lucene stored fields usually are really slow.
>
> when FunctionQueries is backed of field values it uses Lucene FieldCache,
> which is array of field values that's damn faster.
>
> You are welcome.
>
>
> On Thu, Jan 17, 2013 at 8:20 PM, John <fatmanc...@gmail.com> wrote:
>
> > Hi,
> >
> > Is there any performance boost when using FunctionQuery over getting all
> > the documents and analyzing their result fields?
> >
> > As far as I understand, Function Query does exactly that, for each
> matched
> > document it feches the fields you're interested at, and then it
> calculates
> > whatever score mechanism you need.
> >
> > Are there some special configurations that I can use that take make
> > FunctionQueries faster?
> >
> > Cheers,
> > John
> >
>
>
>
> --
> Sincerely yours
> Mikhail Khludnev
> Principal Engineer,
> Grid Dynamics
>
> <http://www.griddynamics.com>
> <mkhlud...@griddynamics.com>
>
