Having in mind Brave should work at least as good as other browser, this might be relevant: when opening the Brave browser, this takes around 10 seconds to open the window on my laptop, while opening Chrome takes around 5 seconds. Why does Brave need so long to load?
Thanks for reporting. It may be vary from user to user. I myself felt that Chrome load slower than Brave on my Windows laptop. Many factors can be the reason for slow start up. The team aware of this and always try to speed up the start up time.
In addition, it may will be better with brave-core, v1.0 coming this year.