New to NextDNS...very slow performance. How to troubleshoot?

Olivier Poitrey Oddly, pulling up *any* web page seems much slower. I switch back to Cloudfare (1.1.1.1) and things speed right up. I'll try some packet captures this weekend to see if I can track it down. Thx for your help and I'll update this thread asap.

JB Wells Olivier Poitrey  Note, I'm not doing  anything fancy here...just changing the IP address of the DNS server under Network Preferences -> Advanced -> DNS on macOS.

JB Wells And I should mention...I've tested it across different machines. Same behavior.

Olivier Poitrey Not from the exact sessions from the gif recording, but it's reproducible...see attached for ones I just generated. Thanks for your help!

Olivier Poitrey 

                                                                                                                                                                            Packets               Pings
 Host                                                                                                                                                                     Loss%   Snt   Last   Avg  Best  Wrst StDev
 1. 172.16.1.1                                                                                                                                                             0.0%   118    1.5   1.6   1.1  19.2   1.7
 2. 216-237-236-254-static.northstate.net                                                                                                                                  0.0%   118    3.0   3.5   2.5  20.1   2.0
 3. 97-75-159-21-static.northstate.net                                                                                                                                     0.0%   118    3.1   3.4   2.5  22.4   2.0
 4. 97-75-159-200-static.northstate.net                                                                                                                                    0.0%   118    2.6   3.2   2.5   7.8   0.6
 5. ae56.edge4.atlanta2.level3.net                                                                                                                                         0.0%   118   21.4  13.6   9.7  40.0   5.9
 6. ae-1-3501.ear1.newyork6.level3.net                                                                                                                                    98.3%   118   24.3  25.4  24.3  26.5   1.6
 7. 4.30.176.218                                                                                                                                                           0.0%   118   21.3  21.7  20.7  28.1   1.4
 8. 199.232.37.67

 Host                                                                                                                                                                     Loss%   Snt   Last   Avg  Best  Wrst StDev
 1. 172.16.1.1                                                                                                                                                             0.0%    16    1.7   1.7   1.2   5.4   1.0
 2. 216-237-236-254-static.northstate.net                                                                                                                                  0.0%    16    2.5   3.2   2.5   4.7   0.7
 3. 97-75-159-21-static.northstate.net                                                                                                                                     0.0%    16    2.7   3.5   2.7   5.7   0.9
 4. dsl-174.d01.tnwabg.infoave.net                                                                                                                                         0.0%    16   15.8   5.8   4.1  15.8   2.9
 5. 165.166.24.22                                                                                                                                                          0.0%    16   10.2  12.0   9.2  37.6   7.1
 6. 167.82.128.34                                                                                                                                                          0.0%    16   12.3  10.1   9.2  12.3   1.0
 7. 151.101.129.67                                                                                                                                                         0.0%    15    9.6   9.6   9.2  11.4   0.5

 Olivier Poitrey If all that is required to use the profile is to install it, then I've done so (see pic attached). However, it had no effect unfortunately...still very slow.

Olivier Poitrey With the profile installed, I get:

{
"status": "ok",
"protocol": "UDP",
"configuration": "fp4e56a330758bc7af",
"client": "x.x.x.x",
"destIP": "45.90.28.101",
"anycast": true,
"server": "vultr-atl-1",
"clientName": "unknown"
}

JB Wells What's even stranger? It doesn't seem to be consistent across devices like I thought. I have a 15" and a 16" macbook...while the 16" was originally exhibiting this behavior, it's not now....and that's really really strange. I'm at more of a loss than I have been in a long time.

At this point, I may try to wipe the 15" and restore from backup and see if that magically fixes it. That said, I had applying medicine without a full diagnosis, and in this case, this just seems really strange...

Thanks for the help and I'll keep you posted. If you think of anything else to check, please let me know.

Olivier Poitrey I did have vpns configured, but verified they weren't in use. 

I resorted to reinstalling macOS, because I don't like unexplainable things. The symptoms have gone away. They've also gone away on the second machine, so it makes me question whether those where truly problems or unfortunate coincidences.

The weird thing is that I *did* have the same symptoms on the second machine before I wiped it as well, so it would seem something in my personal software stack was in play. I am extremely safe with my machine and ran scans with malware bytes, but I did have things like virtualbox  and little snitch installed.

All in all, very weird.

Thanks for the help.

John