> Many will say how they care about cool features, built-in concurrency, nice stuff and in the end, when comes to releasing product if performance isn't there, it won't replace C++.

That's why Rust is about zero-cost abstractions, period. Unlike almost every other new language (for example, Go), we don't accept abstractions that compromise performance.

This is an article about Servo. We care about performance for Servo—along with safety, performance is Servo's entire raison d'être. Much of the focus on performance in Rust is motivated by the desire to build an engine that's faster—not just "as fast as" or "within the ballpark of", faster—than the existing C++ engines.