Websocket RX very slow on windows only.

[bentodman]

Platform

ESP32

IDE / Tooling

pioarduino

What happened?

I've got an ESP32 setup as a GPIO device using FreeRTOS. I'm using ESPAsyncWebServer to serve a Gzip of a preact build thats been converrted to a static header then im using websockets to comunicate between the 2.

My device is converting physical switch inputs to network OSC / UDP data and the webpage allows you to preview / emulate that.
If i send 4switches of change over and over at virtually the same time with a windows client then it really starts to lag to the point where you are a few seconds behind. If i view this on a Mac, IOS or android device then its realtime and no lag is incured. I can see this simultaneously.

Any ideas why this may be?
I saw this post from some time ago that seems to see similar resuslts however it appears they were only testing on windows and it never got solved.
me-no-dev#757

Any suggestions would be greatly recieved.

Stack Trace

None

Minimal Reproductible Example (MRE)

NA

I confirm that:

• I have read the documentation.
• I have searched for similar discussions.
• I have searched for similar issues.
• I have looked at the examples.
• I have upgraded to the lasted version of ESPAsyncWebServer (and AsyncTCP for ESP32).

[mathieucarbou]

Hello,

• Can you also try with the websocat CLI ?
• Did you try to completely turn off Windows Firewall, especially stealth mode which is slowing down connections to ports where nothing is listening as a security against scanners ?

[bentodman]

Thanks for this. I will have a look at websocat, its not something ive come across before. Firewall is already off, stealth mode i'm not sure about but will have a look.

[bentodman]

Its only a hunch but it FEELS like its almost waiting for an Ack before the next message can be sent and on windows its giving it really slowly.

[bentodman]

The firewall is already off, ive tried with stealth mode on and off with no difference.
I've created a quick video showing what i'm seeing.
https://youtu.be/du9Dlx8d7NU