title: How to bulk Upsert json files to azure Cosmos DB (documentDB module)?
body: <p>I am using python to update a lot of data files with new observations using the documentDB module. I have to upsert 100-200 json files per minute, and the upserting operation takes up way more time than the rest of the program. Right now I'm using the 'UpsertDocument' function from the DocumentClient in the module. Is there a faster/better way?</p>