Optimizing JavaScript Code for Better Performance in High-Load Applications

Question

I am developing a high-load web application where performance is critical. I've noticed some lag in the front-end, especially with dynamic content updates.

What I Tried:

Used requestAnimationFrame for animations. Minimized DOM manipulation. Debounced event listeners.

function updateContent() { // Code to dynamically update content ... }

I expected these optimizations to eliminate the lag, but the performance is still not satisfactory. Are there other techniques or best practices I should consider?