You can have same-process memory isolation in any programming environment that support isolates/actors, like JavaScript (via web workers[1]), Dart[2], Pony[3],

You can have same-process memory isolation in any programming environment that support isolates/actors, like JavaScript (via web workers[1]), Dart[2], Pony[3], and if done carefully, Rust[4] (probably many others too but I am not familiar with others that I can remember now). [1] https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers... [2] https://medium.com/dartlang/dart-asynchronous-programming-isolates-and-event-loops-bffc3e296a6a https://medium.com/dartlang/dart-asynchronous-programming-is... [3] https://patterns.ponylang.io/data-sharing.html https://patterns.ponylang.io/data-sharing.html [4] https://doc.rust-lang.org/book/ch16-02-message-passing.html https://doc.rust-lang.org/book/ch16-02-message-passing.html