How can I adjust Matlab Arduino baud rate connection using Matlab to communicate with I2C?

I am using the Arduino Package on Matlab. I am having trouble reading data from FIFO registers due to the data being overflowed in the stack. Matlab is processing my code in seconds but i would like to read from the FIFO registers in ms. Also if you know how i can look at how long it takes for my code to run, please let me know.

E.g iterate = 0;

while iterate <= 50

x = readRegister(MPU9250, register, 'uint8')

MPU(iterate,:) = [x];

end

the code above is running in seconds, how i can speed it up to run in ms.