queryByShape performance

[Guillaume Sueur]

Hi list,

I'm building a piece of software using a queryByShape to retrieve all
administrative boundaries covered by a specific layer. I have severe
performance issues when the layer's shape is spatially wide and
geometrically precise (many coordinates). Is there a way to improve the
performances ? I thought using shptree on both shapes could help, but
apparently not. Any clue ?

Thanks
-- 
Guillaume SUEUR