emacs-from-scratch VS esup

I am building an emacs config, I have got a list and plan of what I want, but I am not sure where I start building, are their any guides or docs on how to build a config from scratch, explainations of concepts like lazy loading, how the different package managers work and what they do, and all the built in emacs concepts and features I have gone though this tutorial, but it doesn't explain anything and doesn't show how to customise anything.

Check out the YouTube channel System Crafters, he has a multipart series "Emacs From Scratch" where he goes over setting up his Emacs installation and setup, and other videos showing how you can do all sorts of things.

There are guides and even video series that cover a lot of beginner stuff. masteringemacs.org has a lot of great articles, and the System Crafters YouTube channel has a lot of great looking stuff.

Hey, I recently set up mu4e following SystemCrafter's guide and was pleased to find everything worked upon setup.

This Youtube Channel has a lot of emacs development, even there's a course to learn emacs lisp.

Depending on what you are looking for, System Crafters has a lot of Emacs content.

A bit older http://emacsrocks.com One of my favourite episodes being http://emacsrocks.com/e13.html the ending is just awesome.

System Crafters yt channel is much newer and also amazing https://youtube.com/c/SystemCrafters

Probably the best way to figure out what's going on at startup time is ESUP (Emacs Start Up Profiler): https://github.com/jschaf/esup You could run it on the old config and the new. Although I suppose the processes may be different enough that there's nothing meaningful to compare.

I agree with you. For startup profiling, use-package-report and https://github.com/jschaf/esup can help too.

A very useful tool for achieving faster startup is esup (https://github.com/jschaf/esup) which times each code block that runs in the emacs startup.

Have you tried running M-x esup with https://github.com/jschaf/esup to see what is taking up the start-up time?

Are you on Emacs 28? Native-comp is enabled by default and it's Just Worked™ for me. Or are you on at least Emacs 27? Emacs 27 added native JSON parsing; stuff like lsp-mode works a lot better now.

(Personally running Emacs 29 built from source on an M1 Pro; everything is instant! Even on my old dumpy i5 machine, everything except startup was pretty snappy, with the exception of startup which took ~4 seconds.)

If it's startup you're concerned about, try the esup[1] package to figure out what's taking so long.

[1]: https://github.com/jschaf/esup

If you're really interested what happens on startup, you can play around with the startup profiler( https://github.com/jschaf/esup ) or similar packages that time the execution of your .emacs.

I used the Emacs Startup Profiler (ESUP) https://github.com/jschaf/esup which identified several culprits in my init files. Removing or deferring the loading of those packages took my startup time from ~15 seconds to about 2.5 seconds. (Still room for improvement!)

GitHub - jschaf/esup: ESUP - Emacs Start Up Profiler

Try out esup