constructor(loadTest) {
		this.loadTest = loadTest
		this.options = loadTest.options
		this.requests = new Map();
		this.partialRequests = 0;
		this.partialTime = 0;
		this.partialErrors = 0;
		this.begunRequests = 0;
		this.totalRequests = 0
		this.lastShownNs = this.getTimeNs();
		this.startTimeNs = this.getTimeNs();
		this.totalTime = 0;
		this.totalErrors = 0;
		this.maxLatencyMs = 0;
		this.minLatencyMs = 999999;
		this.histogramMs = {};
		this.errorCodes = {};
		this.totalsShown = false;
	}
Latency measurements. Receives a load test instance, containing options which can be:
	- maxRequests: max number of requests to measure before stopping.
	- maxSeconds: max seconds, alternative to max requests.