Permanent timestamp retrieval ordering; without explicit sort

I have timeseries data and I always want query results to be in timestamp order. I don't want the overhead of explicitly sorting the results on timestamp; for every query; if possible. Is it possible to permanently order my records in timestamp order?

For other people looking for the same thing. The answer is Field Data Cache or Doc Values.

Read about it here: https://engineering.opendns.com/2015/05/12/elasticsearch-you-know-for-logs-part-3/