final StringBuilder b = new StringBuilder();
            b.append('"').append(StringEscapeUtils.escapeJson(c.getName())).append("\":{");
            append(b, "count", () -> c.getCollectionCount()).append(',');
            append(b, "time", () -> c.getCollectionTime().getMillis()).append('}');
            return b.toString();
        }).collect(Collectors.joining(",")));
        buf.append("},");

        jvmObj.gc = Arrays.stream(gc.getCollectors()).map(c -> {
            final JvmGcObj jvmGcObj = new JvmGcObj();
            jvmGcObj.key = c.getName();
            jvmGcObj.count = c.getCollectionCount();
            jvmGcObj.time = c.getCollectionTime().getMillis();
            return jvmGcObj;
        }).toArray(n -> new JvmGcObj[n]);
        final Threads threads = jvmStats.getThreads();