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Emacs contains special code editing features, a scripting language (elisp), and the capability to read mail, news, and more without leaving the editor. This is the same as emacs-29.1-1, but it is built with the native compilation feature, which we explain briefly: Many of the editing commands used in Emacs are defined in elisp libraries (*.el files). To make Emacs run faster, these libraries are usually compiled to architecture-independent *.elc files, containing "byte-code" representations of the functions in the original files. These byte-code functions are interpreted by the Emacs "byte-code interpreter" when they are called. Native compilation takes this one step further by using gcc to compile the elisp libraries to native shared libraries (like DLLs, but with an extension .eln instead of .dll). This results in a substantial speed-up of Emacs. Some of the .eln files are created at build time. These are installed in a subdirectory of /usr/lib/emacs//native-lisp. Others are created as needed and are stored by default in a subdirectory of ~/.emacs.d/eln-cache. The first few times you run Emacs, it might seem slow to start. This is because it is compiling the elisp libraries that are needed for your init file (usually .emacs). For the same reason, you might see occasional pauses the first time you use a command. But otherwise you should see a noticeable speed-up of Emacs. The .eln files have been built with ASLR[1] enabled. The hope is that this eliminates the fork failures (and the need to rebase) that were present in previous releases with native compilation. If you experience a fork failure in spite of this, please make a bug report to the mailing list. I'd also like to get feedback from people who try the test release for a month or so and don't have any problems. Ken [1] https://www.mandiant.com/resources/blog/six-facts-about-address-space-layout-randomization-on-windows