Super poor performance when Wireguard server enabled on AX6000

[nashant]

Hi all, anyone else got this problem? Been having poor speed and high ping recently and thought it was something more sinister, but did some testing today and turns out it's down to the Wireguard server being enabled on my AX6000. I ran some speedtests, ran some iperf and found this:

Wireguard turned on, from router:

# speedtest -s 36718

   Speedtest by Ookla

      Server: Giganet - Portsmouth (id: 36718)
         ISP: Giganet Limited
Idle Latency:     5.65 ms   (jitter: 0.32ms, low: 5.46ms, high: 5.98ms)
    Download:   698.86 Mbps (data used: 1.2 GB)                                                 
                 15.28 ms   (jitter: 1.60ms, low: 4.58ms, high: 26.78ms)
      Upload:   878.09 Mbps (data used: 795.2 MB)                                                 
                  6.37 ms   (jitter: 0.69ms, low: 4.79ms, high: 16.00ms)
Packet Loss:     0.0%

Wireguard turned on, from wired server:

$ speedtest -s 36718

   Speedtest by Ookla

      Server: Giganet - Portsmouth (id: 36718)
         ISP: Giganet Limited
Idle Latency:     6.22 ms   (jitter: 0.62ms, low: 5.62ms, high: 7.01ms)
    Download:   294.14 Mbps (data used: 148.1 MB)                                                   
                 30.18 ms   (jitter: 7.60ms, low: 6.52ms, high: 264.49ms)
      Upload:   297.68 Mbps (data used: 310.1 MB)                                                   
                219.75 ms   (jitter: 55.43ms, low: 5.33ms, high: 802.08ms)
 Packet Loss:     2.5%

Wireguard turned off, from wired server

$ speedtest -s 36718

   Speedtest by Ookla

      Server: Giganet - Portsmouth (id: 36718)
         ISP: Giganet Limited
Idle Latency:     5.51 ms   (jitter: 0.25ms, low: 5.46ms, high: 5.98ms)
    Download:   923.06 Mbps (data used: 450.0 MB)                                                   
                 11.00 ms   (jitter: 0.88ms, low: 5.18ms, high: 13.15ms)
      Upload:   933.19 Mbps (data used: 465.9 MB)                                                   
                 12.08 ms   (jitter: 0.66ms, low: 6.12ms, high: 17.55ms)
 Packet Loss:     0.0%

Anyone else facing this issue?

 

[L&LD]

Seems normal (i.e. within expected limits) to me.

 

[nashant]

But I wasn't connected to the wireguard server, nothing was. It was merely running.

I have, however, just found this thread which seems to explain all