Sure - in a nutshell - for a large enterprise:
- Disable the QOS engine using a CLI supplicant - "no qos enable no-prompt". Yes I know, QoS is suppose to do the opposite, just not on Aerohive. This provides biggest performance boost - even older AP330s can handle a full 100 clients per radio with breaking a CPU sweat.
- Enable peer to peer blocking. The bigger the organization and bigger your wireless subnet - the bigger the performance gains.
- Disable background scanning when there are clients connected. AP has to kick off clients to do background scanning, this prevents them from being kicked off.