How slow? More than 10 seconds?
I just did a test on Pingdom and the results seem good:
We are running on the Business plan of Discourse.org and we pay $100/month (instead of $200/month) since we are an open source project. We currently have around 500k API requests / pageviews per month. If we get double or triple that, we might have to move their Enterprise plan 
If many users are frequently experiencing very slow page loads (e.g. 10 seconds or more), I could contact Discourse and ask if there is an issue. But I’m pretty sure that they are running their servers as best as they can, so I think it’s normal if it sometimes takes a few seconds to load certain pages.
The Dev Forum is currently hosted on a DigitalOcean droplet with 2GB of RAM. It has a lot of less traffic compared to this forum so that’s why it may feel faster. For example, the Dev Forum currently has around 3500 API requests / pageviews per week while this forum has about 115 000 API requests / pageviews per week.
Here are the results of a test I just did on Pingdom:
