MergeSortedWithTimestamps collapses metrics families with the same name into a single family, preserving the order of the metrics.

Metrics returns the number of unique metrics in the given families.

NewMetricsAnonymizer hashes label values on the incoming metrics using a cryptographic hash.

Pack returns only families with metrics in the returned array, preserving the order of the original slice.

PackLabels fills holes in the label slice by shifting items towards the zero index.

PackedFamilyWithTimestampsByName sorts a packed slice of metrics (no nils, all families have at least one metric, and all metrics have timestamps) in order of metric name and then oldest sample.