Addressing 'Design Mistakes' in Node.js, Its Developers Release JS/TypeScript Runtime Deno 1.0

guest · May 17, 2020

Deno 1.0: Node.js makers have new JavaScript runtime for TypeScript programming language
Server-side JavaScript runtime Deno version 1.0 arrives to fix problems with Node.js
May 14, 2020
https://www.zdnet.com/article/deno-...-runtime-for-typescript-programming-language/

The makers of the widely used JavaScript server-side runtime, Node.js, have released Deno 1.0, a new runtime for JavaScript and TypeScript that addresses "design mistakes" in Node.js.

The Deno JavaScript project has been under development by Node.js creator Ryan Dahl for the past two years and his team of contributors has now released Deno 1.0, which could become just as important for JavaScript developers as Node.js.
However, unlike Node.js, Deno offers first-class support for Microsoft's increasingly popular Typescript, a superset of JavaScript designed for large projects.

Deno is based on Google's Chromium V8 JavaScript engine and written in programming language Rust as opposed to C++ for Node.
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Besides fixing problems with Node.js, Dahl also wanted Deno to cater for JavaScript being a very different language today than it was in 2009, when he designed Node. Additionally, because of Node's wide use, Node has become difficult to update.

"With the changing JavaScript language, and new additions like TypeScript, building Node projects can become an arduous endeavor, involving managing build systems and other heavy-handed tooling that takes away from the fun of dynamic language scripting," writes Dahl in a blogpost co-authored by fellow Deno developers Bert Belder and Bartek Iwańczuk.
Dahl also stresses that Deno is not a fork of Node, but a completely new implementation, albeit with similar goals to Node.
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"A hello-world Deno HTTP server does about 25k requests per second with a max latency of 1.3 milliseconds. A comparable Node program does 34k requests per second with a rather erratic max latency between 2 and 300 milliseconds," he notes.
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Deno 1.0

In recent years programming languages like Rust and Go have made it much easier to produce sophisticated native machine code; these projects are incredibly important developments in computer infrastructure. However, we claim it is still important to have a powerful scripting environment that can address a wide range of problem domains.

Our original undertaking in this area, Node.js, proved to be a very successful software platform. People have found it useful for building web development tooling, building standalone web servers, and for a myriad of other use-cases. Node, however, was designed in 2009 when JavaScript was a much different language.

Deno makes it easy to bind Rust future-based APIs into JavaScript promises.
Rust APIs
The rusty_v8 crate provides high quality Rust bindings to V8's C++ API. The API tries to match the original C++ API as closely as possible. [...]
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