How to use the jstat.jStat function in jstat

function writeResult(res: Result, dir: string) {
	if (!fs.existsSync(dir)) {
		fs.mkdirSync(dir);
	}
	let benchmark = res.benchmark;
	let framework = res.framework.name;
	let data = res.results;
	data = data.slice(0).sort((a: number, b: number) => a - b);
	// data = data.slice(0, config.REPEAT_RUN - config.DROP_WORST_RUN);
	let s = jStat(data);
	console.log(
		`result ${fileName(
			res.framework,
			benchmark
		)} min ${s.min()} max ${s.max()} mean ${s.mean()} median ${s.median()} stddev ${s.stdev()}`
	);
	let result: JSONResult = {
		framework: framework,
		benchmark: benchmark.id,
		type: benchmark.type === BenchmarkType.CPU ? 'cpu' : 'memory',
		min: s.min(),
		max: s.max(),
		mean: s.mean(),
		median: s.median(),
		geometricMean: s.geomean(),
		standardDeviation: s.stdev(),

function writeResult(res: Result) {
  if (!config.WRITE_RESULTS) return;
  const benchmark = res.benchmark;
  const framework = res.framework.name;
  const keyed = res.framework.keyed;
  let type = null;

  switch (benchmark.type) {
    case BenchmarkType.CPU: type = "cpu"; break;
    case BenchmarkType.MEM: type = "memory"; break;
    case BenchmarkType.STARTUP: type = "startup"; break;
  }

  for (const resultKind of benchmark.resultKinds()) {
    const data = benchmark.extractResult(res.results, resultKind);
    const s = jStat(data);
    console.log(`result ${fileName(res.framework, resultKind)} min ${s.min()} max ${s.max()} mean ${s.mean()} median ${s.median()} stddev ${s.stdev(true)}`);
    const result: JSONResult = {
      "framework": res.framework.fullNameWithKeyedAndVersion,
      "keyed": keyed,
      "benchmark": resultKind.id,
      "type": type,
      "min": s.min(),
      "max": s.max(),
      "mean": s.mean(),
      "median": s.median(),
      "geometricMean": s.geomean(),
      "standardDeviation": s.stdev(true),
      "values": data
    };
    fs.writeFileSync(`${config.RESULTS_DIRECTORY}/${fileName(res.framework, resultKind)}`, JSON.stringify(result), {encoding: "utf8"});
  }

function writeResult(res: Result) {
    if (!config.WRITE_RESULTS) return;
    let benchmark = res.benchmark;
    let framework = res.framework.name;
    let keyed = res.framework.keyed;
    let type = null;

    switch (benchmark.type) {
        case BenchmarkType.CPU: type = "cpu"; break;
        case BenchmarkType.MEM: type = "memory"; break;
        case BenchmarkType.STARTUP: type = "startup"; break;
    }

    for (let resultKind of benchmark.resultKinds()) {
        let data = benchmark.extractResult(res.results, resultKind);
        let s = jStat(data);
        console.log(`result ${fileName(res.framework, resultKind)} min ${s.min()} max ${s.max()} mean ${s.mean()} median ${s.median()} stddev ${s.stdev(true)}`);
        let result: JSONResult = {
            "framework": res.framework.fullNameWithKeyedAndVersion,
            "keyed": keyed,
            "benchmark": resultKind.id,
            "type": type,
            "min": s.min(),
            "max": s.max(),
            "mean": s.mean(),
            "median": s.median(),
            "geometricMean": s.geomean(),
            "standardDeviation": s.stdev(true),
            "values": data
        }
        fs.writeFileSync(`${config.RESULTS_DIRECTORY}/${fileName(res.framework, resultKind)}`, JSON.stringify(result), {encoding: "utf8"});
    }

const results = [];

  switch (benchmark.type) {
    case BenchmarkType.CPU:
      type = 'cpu';
      break;
    case BenchmarkType.MEM:
      type = 'memory';
      break;
    case BenchmarkType.STARTUP:
      type = 'startup';
      break;
  }
  for (let resultKind of benchmark.resultKinds()) {
    let data = benchmark.extractResult(res.results, resultKind);
    let s = jStat(data);
    console.log(
      `result ${framework} ${resultKind.id} min ${s.min()} max ${s.max()} mean ${s.mean()} median ${s.median()} stddev ${s.stdev(
        true
      )}`
    );
    let result = {
      framework: res.framework,
      keyed: keyed,
      benchmark: resultKind.id,
      type: type,
      min: s.min(),
      max: s.max(),
      mean: s.mean(),
      median: s.median(),
      geometricMean: s.geomean(),
      standardDeviation: s.stdev(true),