3d-tiles-renderer/src/core/renderer/utilities/throttle.js

https://github.com/AnalyticalGraphicsInc/3d-tiles/tree/master/specification

import { Scheduler } from './Scheduler.js';

// function that rate limits the amount of time a function can be called to once
// per frame, initially queuing a new call for the next frame.
export function throttle( callback ) {

	let handle = null;
	return () => {

		if ( handle === null ) {

			handle = Scheduler.requestAnimationFrame( () => {

				handle = null;
				callback();

			} );

		}

	};

}