Check if you are running arm64 or amd64 brew

With the switch to m1. Most people will still be running the amd64 version of brew, which will be going through a translation layer all the time.

Run

which brew

If you get /opt/homebrew/bin/brew

Then you are using the correct arm version.

If you get /usr/local/bin/brew

You are still using the amd64 version.

You can follow the following if you want to switch.

https://earthly.dev/blog/homebrew-on-m1/