The send_data_impl and recv_data_impl functions can enter an annoying busy loop if a connection is laggy. Potentially if the connection never establishes, this can continue for minutes, until the connection times out, having at least one core running at 100% the entire time, which is undesirable. Adding a usleep(1000) is enough to make sure a torsocks'd program doesn't 100% the CPU, and the user likely will not notice a 0.001 second delay.