Re: [PERFORM] Tsearch2 really slower than ilike ?

[Oleg Bartunov]

On Tue, 16 Nov 2004, Joshua D. Drake wrote:

or more.
Yes site name ... is company names or web site name ... so not many word in 
each record ... but I don't understand why more words are more efficient 
than few words ?? sorry ...

Well there are a couple of reasons but the easiest one is index size.
An ILIKE btree index is in general going to be much smaller than a gist 
index.
The smaller the index the faster it is searched.
for single word queries  @@ should have the same performance  as ilike with 
index disabled  and better for complex queries.


Sincerely,
Joshua D. Drake

Regards,


    Regards,
                Oleg
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Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
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