I upgraded my old RB450G Gigabit router, the version is from 6.46.4 to 6.47beta49, the configuration has not changed, as a result, my Internet speed increased by 25% -30%, from 160M / s to 210M / s, this is a surprise. I use 300M / s fiber, pppoe dial-up to the Internet.

Not only is the speed improvement, the CPU usage has also dropped from close to 100% to about 80%. It's amazing, it seems that there is still a lot of potential in software that can improve performance.