After a botched upgrade from F33 to F36, followed by a fresh install, both F35 and F36 KDE versions give really poor network performance. DNF was working fast originally but slowed eventually down to a crawl, see screen shot.
The performance is really noticeable with web browsing. Chromium seems to work fine with Youtube.com but nothing else, which is the only oddity. Makes me think of DNS something that has changed (DoH?)
This is a fresh install of F36 with only Chromium and Nvidia drivers installed. It lives as a VM on ESXi so the network driver is vmxnet3 (although the problem persists whatever virtual NIC I give it) No other VM has such issues, and F33 was working just fine a day ago.
I don’t have the skills to troubleshoot this myself so I hope I don’t have to go to SUSE or some other distribution.
We really need info about your hardware to be able to troubleshoot.
Please post info in text here by copy&paste within the </> Preformatted text tags. It is easier to read than images and we can also copy&paste from it when in text format.
Please show us the output of inxi -Fzxx.
Can you also give us a screenshot of the results from running the test at www.speedtest.net
Protocols: LLMNR=resolve -mDNS -DNSOverTLS DNSSEC=no/unsupported
resolv.conf mode: stub
Link 2 (ens192)
Current Scopes: DNS LLMNR/IPv4 LLMNR/IPv6
Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
Current DNS Server: 10.0.0.1
DNS Servers: 10.0.0.1
Problem seems to have went away. $resolvectl query found no issues.
Websites seem to resolve in time now. I would leave it down to a repository issue but it clearly wasn’t confined to repos, even earlier today. reddit.com and this website were slow to resolve, now working fine.