I force reloaded it now and it took only a few seconds. It's on CPU from 2014 on a 4G connection. However we are only two data points. Meta probably has a good knowledge of the distribution of the load times.
If your spikes in load time are random it could be the connection, the amount of free RAM on your computer in that very moment, or maybe how well it is syncing with your phone. However I don't know how it handles that. It used to require an online phone but it seems that it can do without it now.
If your spikes in load time are random it could be the connection, the amount of free RAM on your computer in that very moment, or maybe how well it is syncing with your phone. However I don't know how it handles that. It used to require an online phone but it seems that it can do without it now.