class Ticker {
	private ticksPerSecond: { [id: string]: number; }
	private lastTick: { [id: string]: number; }

	constructor() {
		this.ticksPerSecond = {};
		this.lastTick = {};
	}

	private now() {
		return performance.now() / 1000;
	}

	public tick(id: string) {
		const smoothing = 0.99;
		const now = this.now();
		if (!(id in this.ticksPerSecond)) {
			this.ticksPerSecond[id] = 0;
		}
		if (id in this.lastTick) {
			const tps = 1 / (now - this.lastTick[id]);
			this.ticksPerSecond[id] = this.ticksPerSecond[id] * smoothing + (tps * (1 - smoothing));
		}
		this.lastTick[id] = now;
	}

	public dump() {
		for (let id in this.ticksPerSecond) {
			console.log(id + ": " + this.ticksPerSecond[id]);
		}
	}
}