How to optimize loading time of Emacs faster than 1 second?
ChatGPT:
There are several ways to optimize the startup time of Emacs, here are a few things you can try:

Use emacs -q: This starts emacs with no init file, which can help you identify if any packages or settings in your init file are causing slow startup.

Use emacs --debug-init: This starts emacs with the --debug-init flag, which can help you identify any errors in your init file that might be causing slow startup.

Use use-package: This is a package that can help you manage and optimize your packages. It allows you to lazy-load packages, which means that packages are only loaded when they are needed, rather than at startup.

Use straight.el package manager: This package manager optimizes package loading by compiling packages ahead-of-time and using a local cache, which can speed up package loading times.

Use gc-cons-threshold: This variable controls the amount of memory that Emacs will use before triggering garbage collection. By default, it's set to 800000 bytes. You can increase this value to reduce the number of garbage collection cycles and thus speed up the startup time.

Optimize your init file: Make sure your init file is well-organized and free of unnecessary settings or packages. You can also use the benchmark-init package to measure the time it takes for different parts of your init file to load and identify any slow parts.

Use profiler package: This package can help you to identify bottlenecks in your init file by profiling the execution time of various functions.

Use precompiled bytecode: This allows you to precompile your .el files to .elc files, which can speed up the loading process. you can use emacs -batch -f batch-byte-compile to precompile all your .el files.

It's important to note that these steps can help you optimize your emacs startup time, but it's not always possible to get emacs to start up in less than 1 second. The time required to load emacs depends on many factors, such as the speed of your computer and the number of packages you have installed.

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Salute to our heros

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Two crescents in the sky. Daytime Moon meets morning Star.
Image Credit & Copyright: Cui Yongjiang and Shi Zexing
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T.me/astronomy