Limit the MPD input buffer to less than the available memory.

[the_bertrum]

lol.
Was the MPD input cache ever fully developed? When I last looked at it a long while back it was still a WIP with a couple of devs contributing fixes and improvements. I think it sort of works if you allocate enough RAM.

It does work in that it will get the whole of a track into memory at track change rather than get it in chunks as needed throughout the playback.  I rather expected it to get as many tracks as it could until the allotted cache was full.
Either way, I'm not sure it confers much benefit, but I think it just "feels better" to get a whole track in one hit.