Stats.ts

class Stats {
	periods = 0
	totals = {} as Record<string, number>
	starts = {} as Record<string, number>
	start(name: string) {
		this.starts[name] = performance.now()
	}
	end(name: string) {
		if (!this.starts[name]) throw new Error(`No start for ${name}`)
		this.totals[name] = (this.totals[name] ?? 0) + (performance.now() - this.starts[name])
		delete this.starts[name]
	}
	tick() {
		this.periods++
		if (this.periods === 60) {
			console.log('Stats:')
			for (const [name, total] of Object.entries(this.totals).sort((a, b) =>
				a[0].localeCompare(b[0])
			)) {
				console.log(' ', name, total / this.periods)
			}
			this.totals = {}
			this.starts = {}
			this.periods = 0
		}
	}
}
    
    // const stats = new Stats()
    // stats.start('blah')
    // stats.end('blah')
    // stats.tick()