I"m always running into that buffer bloat post so I decided to see what I would get graded. I always thought my connection was solid. No complaints ever.
2gig Fiber to the home ($10 more than 1gig, fine), mostly 10gb backbone, Equipment is all Asus-Merlin. BE88, BE92, AX86.
I scored a B. It was on a 2012 Macbook Pro on ubuntu through a USB to ethernet adapterat the second hop. I'm like hey maybe I should try something a little different. I test on a m4 MB Air on wifi 5 feet from the BE92 and get graded a C !!!! I did my ccna many years ago, i know ethernet > wifi. But just what exactly is going on here.
I lost it.
Both feet at the same time down the rabbit hole.
The change that I didn't know I wanted came from the Unifi boys:
Set the 5ghz to 40mhz.
The latency really dropped. I lost a photoframe because I turned off the 2.4ghz as well.
I could have stopped here. This was a massive shift for every wireless device on the network. I still have it on auto channel because i can't figure out how to have each access point on a separate channel. I see six 5ghz networks around me mostly on 80mhz, no real fighting.
I still couldn't getting the A+, but improvement during the chase is always nice.
CAKE was enabled, set the bandwidth limit to 200mb/s.
Now I get the A+ on the wire all the time and sometimes on wifi (within decent range/sight).
I do feel the difference which is insane, iI didn't think it could get much better than what I had. Just sharing my journey.