Web pages can be re-rendered completely or partially in response to DOM events.

Its releases saw a number of bug fixes and optimizations to improve the speed of the ECMAScript (JavaScript) engine.

This opened up for potential heavy computations on the client side and Futhark, though still fast and efficient, was unable to keep up.

It featured register-based bytecode, native code generation, automatic object classification, and overall performance improvements.

[6][7] Early access in the Opera 10.50 pre-alpha showed that it is as fast as the fastest competitors, being the winner in 2 out of the 3 most used benchmarks.