public static ApdexScore newApdexScore(Histogram histogram) {
        Objects.requireNonNull(histogram, "histogram");
        final long satisfiedCount = histogram.getFastCount();
        final long toleratingCount = histogram.getNormalCount();
        final long totalCount = histogram.getTotalCount();

        return new ApdexScore(satisfiedCount, toleratingCount, totalCount);
    }
<a href="https://en.wikipedia.org/wiki/Apdex">https://en.wikipedia.org/wiki/Apdex</a>
web/src/main/java/com/navercorp/pinpoint/web/applicationmap/histogram/ApdexScore.java