本地是中国（深圳）电信，对端是阿里云香港的轻量服务器（ 30M ）。
建了一个 WireGuard，iPerf3 测速（下行）：
$ iperf3 -c 10.200.200.1 -R
Connecting to host 10.200.200.1, port 5201
Reverse mode, remote host 10.200.200.1 is sending
[ 4] local 10.200.200.2 port 6872 connected to 10.200.200.1 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.00 sec 1006 KBytes 8.24 Mbits/sec
[ 4] 1.00-2.00 sec 472 KBytes 3.86 Mbits/sec
[ 4] 2.00-3.00 sec 437 KBytes 3.58 Mbits/sec
[ 4] 3.00-4.00 sec 450 KBytes 3.69 Mbits/sec
[ 4] 4.00-5.00 sec 343 KBytes 2.81 Mbits/sec
[ 4] 5.00-6.00 sec 522 KBytes 4.28 Mbits/sec
[ 4] 6.00-7.00 sec 586 KBytes 4.81 Mbits/sec
[ 4] 7.00-8.00 sec 501 KBytes 4.10 Mbits/sec
[ 4] 8.00-9.00 sec 317 KBytes 2.59 Mbits/sec
[ 4] 9.00-10.00 sec 387 KBytes 3.18 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 5.12 MBytes 4.30 Mbits/sec 220 sender
[ 4] 0.00-10.00 sec 5.03 MBytes 4.22 Mbits/sec receiver
作为对比，QUIC （同样也是 UDP ）：
$ iperf3 -c 127.0.0.1 -p 1080 -R
Connecting to host 127.0.0.1, port 1080
Reverse mode, remote host 127.0.0.1 is sending
[ 4] local 127.0.0.1 port 7608 connected to 127.0.0.1 port 1080
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.00 sec 7.51 MBytes 62.9 Mbits/sec
[ 4] 1.00-2.00 sec 3.76 MBytes 31.6 Mbits/sec
[ 4] 2.00-3.00 sec 3.80 MBytes 31.9 Mbits/sec
[ 4] 3.00-4.00 sec 3.83 MBytes 32.2 Mbits/sec
[ 4] 4.00-5.00 sec 3.80 MBytes 31.9 Mbits/sec
[ 4] 5.00-6.00 sec 3.80 MBytes 31.9 Mbits/sec
[ 4] 6.00-7.00 sec 3.79 MBytes 31.8 Mbits/sec
[ 4] 7.00-8.00 sec 3.79 MBytes 31.8 Mbits/sec
[ 4] 8.00-9.00 sec 3.80 MBytes 31.9 Mbits/sec
[ 4] 9.00-10.00 sec 3.81 MBytes 31.9 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 51.2 MBytes 43.0 Mbits/sec 0 sender
[ 4] 0.00-10.00 sec 41.8 MBytes 35.1 Mbits/sec receiver
iperf Done.
TLS：
$ iperf3 -c 127.0.0.1 -p 1080 -R
Connecting to host 127.0.0.1, port 1080
Reverse mode, remote host 127.0.0.1 is sending
[ 4] local 127.0.0.1 port 7608 connected to 127.0.0.1 port 1080
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.00 sec 7.51 MBytes 62.9 Mbits/sec
[ 4] 1.00-2.00 sec 3.76 MBytes 31.6 Mbits/sec
[ 4] 2.00-3.00 sec 3.80 MBytes 31.9 Mbits/sec
[ 4] 3.00-4.00 sec 3.83 MBytes 32.2 Mbits/sec
[ 4] 4.00-5.00 sec 3.80 MBytes 31.9 Mbits/sec
[ 4] 5.00-6.00 sec 3.80 MBytes 31.9 Mbits/sec
[ 4] 6.00-7.00 sec 3.79 MBytes 31.8 Mbits/sec
[ 4] 7.00-8.00 sec 3.79 MBytes 31.8 Mbits/sec
[ 4] 8.00-9.00 sec 3.80 MBytes 31.9 Mbits/sec
[ 4] 9.00-10.00 sec 3.81 MBytes 31.9 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 51.2 MBytes 43.0 Mbits/sec 0 sender
[ 4] 0.00-10.00 sec 41.8 MBytes 35.1 Mbits/sec receiver
iperf Done.
其中 TLS 和 QUIC 是用 gost 建立隧道的。
请问大家可能的原因有什么呢？
另外一个信息是：WireGuard 测试本地到服务器的上传没有问题（能跑满 30Mbps ）。
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