@Entrance
    public final void combine(@SourceFrom int value, @Arg int precision) {
        this.isCalculated = false;
        this.precision = precision;

        String index = String.valueOf(value / precision);
        dataset.valueAccumulation(index, 1L);
    }
Percentile is a better implementation than deprecated PxxMetrics in older releases.
This could calculate the multiple P50/75/90/95/99 values once for all.

@since 7.0.0
Deprecated since 10.0.0, use {@link PercentileMetrics2} instead.
oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/metrics/PercentileMetrics.java