Racket v7.7

posted by John Clements

Racket version 7.7 is now available from https://racket-lang.org/.

• Racket CS remains ready for production use—thanks to those who have been putting it into practice to help iron out the remaining kinks—and it now supports a C API for embedding into other applications. See the “Inside: Racket” documentation for details.

• Racket CS uses a new HAMT implementation, dramatically reducing the memory required for immutable hash tables.

• Optimizations to the Racket CS compiler result in a code size savings of approximately 20%.

• GC callbacks are reliably called on major collections in Racket CS. Also, garbage collection is 10–20% faster.

• DrRacket can recover much more quickly from errors involving large stack traces.

• DrRacket now supports the use of the keyboard in the macOS Catalina “Open File” dialog.

• The net/http-client collection supports the deflate content encoding.

• The call-in-continuation function (like Marc Feeley’s continuation-graft) simplifies certain call/cc patterns by calling a thunk in a restored continuation.

• The call-with-current-language form allows more reliable tests for language level code.

• Use of the Cairo library can be multi-threaded.

• Improved documentation!

• Many bug fixes!

Contributors: Alexander Shopov, Ben Greenman, Benjamin Yeung, Brian Adkins, Brian Wignall, Chongkai Zhu, Craig Ferry, David Florness, Fred Fu, Greg Hendershott, Gustavo Massaccesi, Ilnar Salimzianov, Jack Firth, James Bornholt, Jay McCarthy, Jens Axel Søgaard, Jesse Alama, John Clements, Jon Zeppieri, Kartik Singhal, Laurent Orseau, Leo Shen, Luka Hadži-Đokić, Matthew Butterick, Matthew Flatt, Matthias Felleisen, Mike Sperber, Noah W M, Paulo Matos, Philip McGrath, Philippe Meunier, Ricardo Herdt, Robby Findler, Ryan Culpepper, Sam Tobin-Hochstadt, Sorawee Porncharoenwase, Spencer Florence, Stephen Chang, Syntacticlosure, Thaddäus Töppen, Tom Gillespie, Xu Chunyang, ZHUO Qingliang, kryptine, mehlon, muzimuzhi, redwyn, and Štěpán Němec