perf_hooks.createHistogram

The lowest discernible value. Must be an integer value greater than 0. Default: 1.

The highest recordable value. Must be an integer value that is equal to or greater than two times lowest. Default: Number.MAX_SAFE_INTEGER.

The number of accuracy digits. Must be a number between 1 and 5. Default: 3.

The EWMA half-life in number of samples. When set to a value greater than 0, the histogram tracks an exponentially weighted moving average and standard deviation, accessible via histogram.ewmaMean and histogram.ewmaStddev. After halfLife recordings, a value's influence has decayed to 50%. Default: 0 (disabled).

An SLO threshold value. When set together with halfLife, the histogram tracks a smoothed error rate for values exceeding this threshold, accessible via histogram.ewmaErrorRate and histogram.burnRate(). Default: 0 (disabled).