Back when I still used Windows 10 for work (stopped September 2019) Erlang and thus Elixir were definitely slower than on Linux and macOS. Just one extra data point.
Even on a pretty pathetic laptop (i3 CPU with 2 cores) my dev mode apps with code reloading still respond in 5 to 50 ms in Linux. And on my main workstation (macOS) I often see response times below 1ms.
