No short-circuiting in hibernate-search queries?

Jimmy Praet · **Joined:** Thu Jan 21, 2010 12:04 pm **Posts:** 1

Hi,

I have a hibernate-search index of about 150.000 Street objects, containing among others the postal code and description.

Now if I have a BooleanQuery like this:

Code:

BooleanQuery query = new BooleanQuery();
query.add(new TermQuery(new Term("postalCode", String.valueOf(postalCode))), Occur.MUST);
query.add(new FuzzyQuery(new Term("description", description), 0.75f), Occur.MUST);

This takes about 120ms.

And this:

Code:

BooleanQuery query = new BooleanQuery();
query.add(new FuzzyQuery(new Term("description", description), 0.75f), Occur.MUST);

Also takes about the same time.

I think that the first query should be way faster, as the more time consuming fuzzy query should only be evaluated for those streets that have a matching postal code.

Any thoughts?

hardy.ferentschik · **Posted:** Sat Jan 23, 2010 8:05 am

I don't know so much about the intrinsics of these type of things. For me this sounds like a question for the Lucene forum. I am sure there you would get a better answer.

sanne.grinovero · **Posted:** Sun Jan 24, 2010 5:04 pm

Quote:

This takes about 120ms.

while you should definitely follow Hardy's advice to know about shortcuiting, this time is way too high for a single query on an index of only 150.000 simple elements; my guess is you're actually measuring the time it takes to open the index, which is the same for both cases and is quite more costly than a single query; how are you "benchmarking" this?