Optimize geo indexing

Moved from GitHub dgraph/2897

Posted by manishrjain:

The current geo indexing is very heavy because it creates too many tokens. We need to decrease the number of tokens created during geo indexing, so it can perform better.

campoy commented :

Setting to P1 since some customers have requested this.

joshuabezaleel commented :

Are there any recommendations on where to start and references if someone is interested in this?
Thank you very much! :slightly_smiling_face: