[dev] directions to the right project team

Too whom it may concern, I am relatively new to contributing to OpenStack and therefore am not sure who to direct this question too. I have the following issue. The firm I am currently working at is running OpenStack at sale with circa 6000 different projects. Whenever we try to access a projects tab via horizon we experience a timeout (accessing through the API works fine). To that end we were hoping to implement something akin to pagination or filtering. I was hoping to work on this and contribute the outcome to OpenStack. Is this something worthwhile and which group should I talk to; keystone, horizon or both ? I apologise in advance if I have missed something. Best Regards, Sergey