Hi,
I've had the pleasure and misfortune to test both of the widely known
portable MIDI libraries, and now believe I have found one that works to
my satisfaction.
This is not a quantifiable review with benchmarking but the subjective
experience of someone who has implemented a very simple yet nonetheless
professionally implemented, low-latency, jitter-free and real time
application.
The two candidates are
portmidi (
http://www.cs.cmu.edu/~music/portmusic/)
and
RtMidi (
http://www.music.mcgill.ca/~gary/rtmidi/)