Performance

Performance is critical in real-time 3D applications. Ensuring smooth frame rates and responsive interactions makes the difference between something that feels right and something that feels broken.

JavaScript is fast (if you use it right)

While JavaScript lacks some nice features of other programming languages often used in game development like C++ and C#, it is likely fast enough.

Modern JavaScript engines like V8 are highly optimized. Most performance issues come not from the language itself, but from poor coding patterns such as frequent object allocations, wrong data structures, or unnecessary physics queries.

By reusing objects, minimizing garbage collection, and keeping GPU usage efficient, JavaScript can deliver smooth, real-time experiences, even on lower-end hardware.