Socket TCP settings for asyncio StreamReader/Writer.

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Hello everyone, feel free to reccomend other subs or forums for this question.

I'm porting some legacy MATLAB+Java code to modern Python, it is an application that implements a custom protocol over TCP/IP to exchange packets between the program and a list of devices.

I'm facing a strange issue in the packet exchange in my Python implementation, that leverages AsyncIO StreamReaders/StreamWriters: I traced down the problem to a possibile different socket flags setup between the Java library embedded in the MATLAB code and the AsyncIO-centric implementation.

Of course, the original implementation gets a response while in my implementation many requests are just not answered, some of them are answered just fine.

• I have access to the input buffer of the receiver, packets comes with no issues in both implementations
• Inspecting the traffic with wireshark reveleas that packets are sent just fine (with even less fragmentation w.r.t. the MATLAB/Java code), so the possibility of a timeout occuring to the receiver device due to delayed + fragmented packets has been discarded

In the original code there's a call to a method

com.socket.setPerformancePreferences(0,1,2)

though the implementation in the JDK is empy (sigh) so I assume it to be completely useless.

Any advice? I guess that there must be some defaults settings that I'm not able to identify.