Will rounding lat / lng in geo_points result in better performance?

I have a geo_point location field on every document. Some of these are pretty high precision and we do a lot of geo_polygon filters. For our use case, I don't need precision over 4 decimal places. Will rounding these before creating the document result in any performance improvement?

For instance, [-73.986421834829, 40.7253832828] will change to [-73.9864, 40.7254]

I'm on ES 2.4 (but we are looking to move to ES 5).

It should, yes.

Thanks! Can you provide any details on why or in what way?

Because you need to do less work to get a match.

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