Speed up communication with HASS REST API?

Are there recommendations to have a fast communication with the REST API of HASS? What is the fastest interface for using HASS functionalities?

Currently I’m working with python 2.7.9 and its requests ans json module. Using requests.sessions() speeded things up a lot already. HASS is running on a Raspberry Pi Model B+ (512MB/700MHz). Nothing else on this server is running. I think it’s enough muscle to run HASS.

Thanks for your inputs!

I added this to my Rest sensor and it speed up the polling from default 10.

scan_interval: 1