Please double check your tracing statistic logic

In TracingInfo:

for (int i = 0; i < messages.length; i++) {
final Message message = messageList.get(i);
final StringBuilder textSB = new StringBuilder();
// event
textSB.append(String.format("%-11s ", message.getEvent().category()));
// duration
textSB.append('[')
.append(formatDuration(message.getDuration()))
.append(" / ")
.append(formatDuration(fromTimestamp, message.getTimestamp()))
.append(" ms |")
.append(formatPercent(message.getDuration(), toTimestamp - fromTimestamp))
.append(" %] ");
// text
textSB.append(message.toString());
messages[i] = textSB.toString();
}

This logic is actually not correct.

Since your message time measurement is in sequence.

Some message are summary message which wrap others.

So, startTime is not reliable:

` final long fromTimestamp = messageList.get(0).getTimestamp() - messageList.get(0).getDuration();`

Say we have time sequences:

t1, t2, t3, t4

You might use (t3-t2) as first message and (t4-t1) as the second one.
In this case, t2 is not the very start time.

Thanks
Leon