() {
    return {
      processes: [
        {
          name: 'Browser',
          pid: 12345,
          threads: [
            {
              name: 'CrBrowserMain',
              tid: 1,
              slices: (() => {
                const slices = [];
                for (let i = 0; i < 1000; i += 20) {
                  slices.push({range: [i, i + 10], cpu: 5});
                }
                return slices;
              })(),
            },
            {
              name: 'Chrome_IOThread',
     