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Switching to 5Ghz WiFi made the Raspberry Pi fly again

Preventing lackluster wifi speeds on a Raspberry Pi 4

I've never noticed any latency problems with it, so it took me by surprise when I deployed some OCaml experiments on the Pi and observed a lot of HTTP connection timeouts and name resolution errors while fetching some URLs concurrently. Running uptime showed 120 days, so I blamed it on some obscure wifi stack issue and did what most people would: But it doesn't really matter, since it's been working fine for the last few days, and once the brand new network cable arrives, the Pi will be plugged directly into the router.

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