So, the output of
top which you've added shows what's going on, and is in general what you should look at when you wonder what's slow.
The top of the screen shows some overall system info — including the load average, which gives a sense of system use over the past 1, 5, and 15 minutes (in that order). If the number is about equal to the number of CPU cores on your system, the system is busy but keeping up; higher than that means overloaded.
Below that (below the reverse-background white bar), top
processes in order (by default) of CPU consumption, and so if there's something constantly at the top of that, it's probably to blame. Don't worry so much about the priority and memory numbers in the first few colums — look at %CPU.
In your case, clearly thee top processes are Chrome. Is it stuck? Try closing that program and see if it goes away and the load goes down. If not, kill the process — press