James - thanks for alerting me to this on Twitter.
Marcelle - I will continue the conversation with you here in this public forum.
We have had a few reports from customers, including this thread, that there has been a deterioration in performance over the last few months . This is a topic that has worked it's way to the top of our priority list.
For the techies reading, it appears that the deterioration may coincide with our increased adoption of Angular and we will be looking at optimising that as well as other ways to improve performance. Our product team has an existing focus on defects for the next couple of weeks (our existing sprint) after which we will have time to address this properly.
Please have patience, but I wanted to say that we have heard your feedback about performance slowing, we are aware of it and we will resolve it shortly.