Memory leak in HTTP GET request

[LHeczko]

Hi,

I'm using AsyncWebServer and I have a problem, that each time I make a request from Chrome web browser it takes some memory and it need about 20 seconds to free it. I've tried to make request from Postman and Firefox and it's ok.
I was looking for solution and somebody told me that Chrome make requests to favicon.ico, I've added empty response and nothing changed. I've also tried to close connection after request - request->client()->stop(), but it also didn't nothing.

Do you have any idea what I can do with this?

Simply example in attachement

Async TCP 3.4.7
ESP Async WebServer 3.8.0

VisualMicro for Visual Studio 2022

Thanks
Łukasz
AsyncWebServer memory.txt

[mathieucarbou]

Hello,
I do not understand: you say you use Async TCP 3.4.7, but your code shows you are on 8266 with ESPAsyncTCP.h....

[LHeczko]

You are right - both libraries installed, bu you are right - ESP Async TCP 2.0

[mathieucarbou]

ok! so we do not actively test on 8266 - it is not supported anymore (and in next major version it will even be dropped).

it looks more like concurrent requests which take up heap memory and the network layer requires time to free it (lwip does that too on esp32, it takes a little time to see the memory be freed).

your code looks okay to me... but to be sure, you can just run one of the examples in the project to compare.

I was more expecting issues with FF because it has https mode on by default: FF is sending on the background several SSL handshakes to the same non-ssl port which causes new lwip connections to be aborted.

[LHeczko]

In ESP32 it's harder to analyze, because memory skip up adn down for some reason, but after HTTP request it goes down and after some time it's freeing.

As i wrote - there is no problem using Postman or Firefox - only Chrome

AsyncWebServer memory.txt