I use Doom Emacs with the Yamamoto port of Emacs [1] on MacOS (M1) and the startup time is quite slow: it takes around 6-7 sec. for the editor window to show up. It doesn’t bother me too much since I usually start it once a day and just never close it, as you mentioned.

However, I also have many plugins installed, so it might be just that. I wonder if it is possible to install a separate instance of Emacs, then I would be able to test the performance without all the plugins and configuration.

[1]: https://github.com/railwaycat/homebrew-emacsmacport