Slowish day. Did some random programming. For some reason I am unable to get cygwin mlton to work, which I only attempted out of curiosity. The mingwin build seems to work fine. The symptom is that for a compile of a trivial file, the memory usage of the compile process shoots up to about 180M, then drops back down to like 10K but never decreases much below that, and the process becomes apparently unkillable from the windows task manager, even if I kill all of cygwin.