After importing browsing history from mozilla firefox, typing into the address bar sends the CPU to 100% and beyond on the brave process. It’ll max out on CPU, freeze for about 4 seconds, and then the suggestion drop-down appears. If you type another character, the process repeats.
Deleting browsing history fixes the issue, but I’d imagine this would re-occur as the history is built up again. The browser def needs to be able to retain a high volume of browsing history without breaking the suggestion function.