Rust

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Rust is a systems programming language that gives you the speed of C and C++ without their most common memory bugs. Its compiler tracks who owns each piece of data and how long references live, so whole classes of crashes and security flaws, such as use-after-free and data races, are caught before the program ever runs.

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RustNov 2

Rust Programming Language: A Beginner-Friendly Guide With Real Examples (and Why Anthropic Moved Its API to Rust)

Anthropic recently moved Claude's Messages API from Python to Rust and reported roughly 40% to 50% less CPU use. This beginner-friendly guide explains the Rust programming language from the ground up, with every example compiled and run: ownership, borrowing, Option and Result, traits, iterators, threads, tests and a small JSON API. It also includes an honest Python vs Rust comparison with a real benchmark.

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Rust: where to start

Expect the first few weeks to feel slow. Ownership and borrowing are the core ideas, and the compiler will reject code that would be fine in other languages until they click. Practise with small programs, read the error messages carefully (they are unusually helpful), and let Cargo handle building, testing and adding crates.

After ownership, learn Result and Option for error handling, then traits and generics. Leave async code and heavy lifetime annotations until the basics feel natural; plenty of useful command-line tools and web services need neither.

Rust now turns up in places few developers expected a decade ago: browser engines, the Linux kernel, cloud infrastructure and the tooling behind JavaScript and Python. Posts here explain the language for working developers, with examples you can compile and change.