Extremely slow toolchain download

Verification

• I searched for recent similar issues at https://github.com/rust-lang/rustup/issues?q=is%3Aissue+is%3Aopen%2Cclosed and found no duplicates.
• I am on the latest version of Rustup according to https://github.com/rust-lang/rustup/tags and am still able to reproduce my issue.

Problem

rustup toolchain install nightly-2024-10-19-aarch64-apple-darwin

.. no firewall or vpn ..

starts 4mib/s then immediately drops to 17kib/s

Steps

rustup toolchain install nightly-2024-10-19-aarch64-apple-darwin

Possible Solution(s)

wait

Notes

it's not the first time this happens

Rustup version

$ rustup --version
rustup 1.27.1 (54dd3d00f 2024-04-24)

Installed toolchains

$ rustup toolchain list
stable-aarch64-apple-darwin (default)

OS version

macOS Sequoia 15.1 (24B82)