ralf schmitt zsobrpgmailcom tue apr 15 2008 119 guido van rossum wrote imaplib apparently specifying 10mb know much data want bother looping data smaller buffer increments eg 64k probably max tcp stacks give well calling read size 10mb possible problem value ended inside recv call mallocrealloc calls im right hunch tcp stack probably clamp 64k perhaps use minsystem limit maxrequested size buffer size yes trying explain guido van rossum home page httpwwwpythonorgguido thu 07 aug 2008 170915 0200 pythondev bad network performance