[android-developers] DB4O Native query time issue

Hi all,
presently i am getting problem to retrieve data from db4o, it has been
consuming much more time than sqlite .
is i am doing something wrong or it is due to db4o?
i have object of Recipe Class, for testing i have approx 1000 objects
of Recipe, but in real world it will go approx
50000 objects or more. in my testing with 1000 objects, when i have
been retrieving Recipe by it's one field, it is consuming approx
181293ms.
my query code is below.

public List<Recipe> getRecipebyDishType(final int dishType)
{
List<Recipe> recipelist=null;
long t1=System.currentTimeMillis();
recipelist= db().query(new Predicate<Recipe>() {
public boolean match(Recipe recipe) {
return recipe.get_dishTypeID() == dishType;
}
});
long t2=System.currentTimeMillis();

Log.e("Time consume to retrive recipe by Dish type ***","Time
consume to retrive recipe by Dish type ="+(t2-t1)+"ms");
return recipelist;
}

1. is i am doing any thing wrong?
2, can we have a query to retrieve random recipe (single object) by
dishTypeID fields?

Thanks
imran ali

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