Socket between two Matlab programs

I built a pair of matlab scripts that are supposed to communicate with each other over socket. The idea is that eventually function 1 will be communicating with an external program over socket in the same manner, so I've built function 2 as a dummy function to test the dynamics that rely on that communication. However, I'm having trouble with the data transfer.

Function 1 (only socket-related code shown)

...
... 
    %set up send & receive network connection
    t1 = tcpip('0.0.0.0', 50000, 'NetworkRole', 'server'); % Dummy -> Sim connection
    t2 = tcpip('localhost', 50001, 'NetworkRole', 'server'); % Dummy <- Sim connection
    fopen(t1)
    fopen(t2)
...
...    
    
        fwrite(t2, 1) %corresponds to header on dummy side
        fwrite(t2, SNRs, 'double') %corresponds to learningIn on dummy side
        
        while ~(t1.BytesAvailable) %wait for dummy to respond with output
            pause(1)
        end
        
        hp = fread(t1, 1, 'int8'); %corresponds to learningOut on dummy side
...
... 

Function 2 (Dummy)

    t1 = tcpip('localhost', 50000); % Dummy -> Sim connection
    t2 = tcpip('localhost', 50001); % Dummy <- Sim connection
    fopen(t1)
    fopen(t2)
    
    sceneOver = 0;
    
    while ~(sceneOver)
        
        while ~(t2.BytesAvailable) %wait for Sim to send header & data
            pause(1)
        end
    
        header = fread(t2, 1); 
        
        if header == 1 
            learningIn = fread(t2, t2.BytesAvailable, 'double'); %corresponds to SNRs on Sim side
        elseif header == 9
            sceneOver = true;
            continue;
        end
        
        learningOut = binornd(1, .5, 1); 
        fwrite(t1, learningOut) %corresponds to hp on Sim side

    end

My issues is this - the way it's here written here now, the line that reads in the double in function 2 takes roughly ~10 seconds to run. It does read in the correct input though.

I've tried getting rid of the 'double' qualifier in both the fwrite and the fread function (example of those lines below) as I've seen in some examples, but for some reason it only transfers 1 byte each time and I get the unit8 converted version of SNRs - even though I've seen examples transfer double data without the 'double' qualifier.

Function 1

    fwrite(t2, SNRs) %corresponds to learningIn on dummy side

Function 2

    learningIn = fread(t2, t2.BytesAvailable); %corresponds to SNRs on Sim side

Essentially, I'm fairly sure I'm doing something wrong as taking 10 seconds to read in a single double doesn't seem like correct operation, and I'm looking for advice on how to implement this correctly. Thank you.