Racket is great! The runtime is reasonably fast, and the standard library is exceptionally featureful, including, for example, a decent plotting library, an HTTP server, decent HTML and JSON support, several forms of multi-threading, and a quite good FFI, all of which Herbie uses extensively. I suppose the parentheses are a question of taste (I like them!) but a lot of the specific syntactic decisions, like the `for` and `match` macros, are quite nice.
posted by Stephen De Gabrielle and John Clements
We are pleased to announce Racket v9.3 is now available from https://download.racket-lang.org/.
raco setup command can generate markdown documentation, using the --doc-markdown option.raco pkg install command includes new options that provide more install-time configuration flexibility: --adjacent-deps, --destdir, and --attach, and a refined --skip-installed.ffi/unsafe/runtime-lib library provides a define-runtime-lib mechanism similar to define-runtime-path, allowing location of libraries located relative to a source file.prompt-tag/c contract generator no longer performs checking on call/cc when the #:call/cc option is not present.impersonate-prompt-tag function takes an additional argument that allows checking and update of results for composable continuations.error-syntax->srcloc-handler parameter provides control over the mapping from syntactic forms to source locations for error handling.(tcp-listen 0) will retry when it fails with “address in use”.racket/base module requires fewer internal modules and instantiations.file/zip package provides a new mechanism for greatly increased control over zip file generation, allowing in-memory file sources and per-file compression control.The following people contributed to this release:
Alex Knauth, Alexander Shopov, Aris Spathis, Bert De Ketelaere, Bob Burger, Caleb Mazalevskis, Cameron Moy, Geoffrey J. Teale, Gustavo Massaccesi, Hannes Braun, Jade Sailor, Jason Hemann, Jens Axel Søgaard, John Clements, Jordan Johnson, Matthew Flatt, Matthias Felleisen, Mike Sperber, Nathan Dykman, Noah Ma, Philip McGrath, Robby Findler, Romeo Ahmed, Sam Tobin-Hochstadt, Shu-Hung You, Stefan Schwarzer, Stephen De Gabrielle, and Wing Hei Chan.
Racket is a community developed open source project and we welcome new contributors. See racket/README.md to learn how you can be a part of this amazing project.
Questions and discussion welcome at the Racket community on Discourse or Discord.
If you can - please help get the word out to users and platform specific repo packagers
Racket - the Language-Oriented Programming Language - version 9.3 is now available from https://download.racket-lang.org
See https://blog.racket-lang.org/2026/08/racket-v9-3.html for the release announcement and highlights.