Racket 6.8 發布了，該版本包含如下改進內容：
Racket sports a new logo, courtesy of Matthew Butterick.
MacBook Pro laptops with touch bars are supported.
Support for FreeBSD on PowerPC.
Initial support for GTK3 on Wayland is available. GL contexts, GC blits, and dialog placement currently do not work.
The macro stepper provides a command-line interface via the raco macro-stepper command.
Typed Racket more efficiently represents and computes types and propositions, resulting in faster type checking for many programs. For more details, see this blog post by Andrew Kent.
The bytecode optimizer can reduce more expressions of the form (equal? x y) to (eqv? x y) or (eq? x y) when the type of x or y is known.
The bytecode optimizer avoids dropping stack frames in some reductions. This provides better stack traces for errors when errotrace is enabled.
The bytecode compiler detects more optimization opportunities, including when variables always hold a boolean value. In particular in expressions like (or (symbol? x) (something)), the optimizations avoid the creation of an intermediate variable to store the result of (symbol? x).
The syntax form preserves syntax properties on all template pieces.
The scribble/html/extra module provides renderers for HTML elements that are part of the WHATWG HTML standard but not part of the scribble/html language by default (e.g., map, time, video).
The DeinProgramm teaching languages support pattern matching using the match form.
In the DeinProgramm languages, define-record-procedures supports specifying signatures as part of the form, instantly enabling properties quantifying over such records.
下載地址：https://download.racket-lang.org/
Racket源自著名的專家型語言PLT Scheme，同時又是Lisp語言的一個分支。它適用於從腳本Script到應用程式開發的任務執行工具，包括圖形用戶界面，Web伺服器等。支持編譯器的虛擬機，創建獨立的可執行程序的工具，Racket Web伺服器，具有豐富而全面的功能庫，適用於初學者和專家編程。