v8.17 announcement

Author: jbclements

announcements/v8.17.txt

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+1747331610
+Racket v8.17
+
+----------------------------------------------------------------------
+
+- The new `drracket-core` package provides a version of drracket with
+  a smaller set of dependencies.
+- Typed Racket has support for treelists.
+- The package manager computes checksums for packages when required,
+  allowing the use and automatic upgrade of packages without them.
+- The `bitwise-first-bit-set` function returns the smallest bit that
+  is set in the twos-complement representation of the given number.
+- The updated `dynamic-require` function makes it easier to use syntax
+  bindings by allowing a syntax-thunk (or 'eval) to be used for them.
+- The `error-module-path->string-handler` parameter allows the
+  customization of the display of module-paths in error messages.
+- Precision of certain numeric functions (`sin`, `cos`, and others) is
+  improved on Windows platforms by using the MSVCRT/UCRT libraries.
+- The `string-append` function has improved performance and reduced
+  memory use for long lists of strings in the Racket CS
+  implementation. Differences are clearly noticeable for lists of
+  length 1 million.
+- TCP ports use `SO_KEEPALIVE`, instructing the kernel to send
+  periodic messages while waiting for data to check whether the
+  connection is still responsive
+- Racket code using a terminal in Windows can receive mouse events as
+  virtual terminal characters after using SetConsoleMode. (This is
+  also already possible on macOS and Linux.) See the tui-term package
+  for related example code.
+- The `#:replace-malformed-surrogate?` keyword can be used to specify
+  a replacement for malformed unicode surrogates in JSON input
+- The http-client module no longer sends "Content-Length: 0" for
+  requests without a body.
+- The demodularizer (`compiler/demod`) can prune more unused
+  assignments
+- Several judgment rendering forms in Redex are replaced by functions,
+  allowing more convenient abstraction.
+- When a distribution includes no teaching languages, DrRacket’s
+  language-dialog configuration moves into the preferences dialog and
+  the “Language” menu disappears.
+- The math library has better support for block-diagonal matrices,
+  including both Racket and Typed Racket.
+- The math library contains improved implementations of acos and
+  matrix-(cos-)angle.
+- The stepper again works for `big-bang` programs.
+- There are many other repairs and documentation imprevements!
+
+The following people contributed to this release:
+
+Alexander Shopov, Andrei Dorian Duma, Bert De Ketelaere, Bob Burger,
+Bogdan Popa, Bogdana Vereha, Cameron Moy, Chung-chieh Shan, Cutie
+Deng, D. Ben Knoble, Dario Hamidi, Dominik Pantůček, Gustavo
+Massaccesi, halfminami, Jacqueline Firth, Jason Hemann, Jens Axel
+Søgaard, Joel Dueck, John Clements, Jordan Harman, Marc
+Nieper-Wißkirchen, Matthew Flatt, Matthias Felleisen, Mike Sperber,
+Noah Ma, owaddell-ib, Philippe Meunier, Robby Findler, Ryan
+Culpepper, Ryan Ficklin, Sam Phillips, Sam Tobin-Hochstadt, Shu-Hung
+You, sogaiu, Sorawee Porncharoenwase, Stephen De Gabrielle, Vincent
+Lee, and Wing Hei Chan.
+
+----------------------------------------------------------------------