http://bugs.winehq.org/show_bug.cgi?id=16941
--- Comment #1 from Alexandre Julliard julliard@winehq.org 2009-01-15 13:02:25 --- The version from debugtools.c is the one that is used, so it is a single call to write. There isn't really anything more we can do. You can put the output file in append mode with a >> redirection, this may help.