    if (!histograms.getHistogramNamed(p.cpuHistogramName)) {
          histograms.createHistogram(
              p.cpuHistogramName, timeDurationInMs_smallerIsBetter, [],
              { binBoundaries: LOADING_METRIC_BOUNDARIES,
                description: p.cpuHistogramDescription,
                summaryOptions: SUMMARY_OPTIONS,
              });
        }
        const cpuHistogram = histograms.getHistogramNamed(p.cpuHistogramName);
        addSamplesToHistogram(p, p.cpuBreakdownTree, cpuHistogram, hist