Post Syndicated from jake original https://lwn.net/Articles/1047549/

The Racket programming language
project has released Racket
version 9.0. Racket is a descendant of Scheme, so it is part of the Lisp family of languages. The headline feature in the release is parallel
threads, which adds to the concurrency tools in the language: “While
Racket has had green threads for some time, and supports parallelism via
futures and places, we feel parallel threads is a major addition.”
Other new features include the black-box
wrapper to prevent the compiler from optimizing calculations away, the decompile-linklet
function to map linklets
back to an s-expression, the
addition of Weibull
distributions to the math library, and more.