It's slow per se, since it loads terms positions. Usual advices are
shingling or edge ngrams. Note, if this is not a text but a string or enum,
it probably let to apply another tricks. Another idea is perhaps
IntervalQueries can be smarter and faster in certain cases, although they
are backed on the same slow positions.
On Tue, Feb 4, 2020 at 7:25 AM <baris.ka...@oracle.com> wrote:
> How can this slowdown be resolved?
> is this another limitation of this class?
> Thanks
>
> > On Feb 3, 2020, at 4:14 PM, baris.ka...@oracle.com wrote:
> >
> > Please ignore the first comparison there. i was comparing there {term1
> with 2 chars} vs {term1 with >= 5 chars + term2 with 1 char}
> >
> >
> > The slowdown is
> >
> > The query "term1 term2*" slows down 400 times (~1500 millisecs) compared
> to "term1*" when term1 has >5 chars and term2 is still 1 char.
> >
> > Best regards
> >
> >
> >> On 2/3/20 4:13 PM, baris.ka...@oracle.com wrote:
> >> Hi,-
> >>
> >> i hope everyone is doing great.
> >>
> >> I saw this issue with this class such that if you search for "term1*"
> it is good, (i.e., 4 millisecs when it has >= 5 chars and it is ~250
> millisecs when it is 2 chars)
> >>
> >> but when you search for "term1 term2*" where when term2 is a single
> char, the performance degrades too much.
> >>
> >> The query "term1 term2*" slows down 50 times (~200 millisecs) compared
> to "term1*" case when term 1 has >5 chars and term2 is still 1 char.
> >>
> >> The query "term1 term2*" slows down 400 times (~1500 millisecs)
> compared to "term1*" when term1 has >5 chars and term2 is still 1 char.
> >>
> >> Is there any suggestion to speed it up?
> >>
> >> Best regards
> >>
> >>
> >>
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--
Sincerely yours
Mikhail Khludnev
