This is the throughput of the 4 UDT flows during the 700 seconds experiment.
We can see that all flows share the bandwidth almost equally (figure and the FI value in table), and the aggregate throughput uses about 90% of the bandwidth. In addition, the oscillations are very small.
In contrast, a single TCP flow can only reach 5Mb/s along this link using the default setting of Linux. With a thorough tuning for TCP performance, we can still only reach about 40M/s.