The phrase "superb performance" means that someone or something did exceptionally well or outstandingly in their job, task, or activity. Full definition
As it stands, it's still an excellent gaming monitor with superb performance, but you'll want to make sure you're getting what you want at that price. (tomsguide.com)
It's a very technically advanced engine, giving superb performance and yet really high mpg when required. (autocar.co.uk)
This year the car's fuel - injected 4.5 - liter, V - 8 engine produces 200 horsepower and delivers superb performance. (articles.orlandosentinel.com)