想知道，iperf3 中 UDP 的比特率统计是否仅考虑单位时间发送的有效载荷数据或单位时间发送的有效载荷数据 + 报头长度？
Sample Stats:
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Server listening on 5201
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Accepted connection from 10.0.1.1, port 39099
[ 5] local 10.0.1.2 port 5201 connected to 10.0.1.1 port 50000
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
0.00-0.10 sec 1.44 KBytes 118 Kbits/sec 98197536003.664 ms 0/1 (0%)
0.10-0.20 sec 7.88 MBytes 662 Mbits/sec 0.014 ms 0/5612 (0%)
0.20-0.30 sec 11.3 MBytes 949 Mbits/sec 0.012 ms 0/8063 (0%)
0.30-0.40 sec 11.3 MBytes 949 Mbits/sec 0.025 ms 0/8062 (0%)
0.40-0.50 sec 11.3 MBytes 950 Mbits/sec 0.026 ms 0/8060 (0%)