please take a look here: http://edwardlib.org/troubleshooting
edward should answer some of your prayers :) there's still some time until stan goes parallel/gpu, though there's lots of interest there.
riemannin hmc is likely just around the corner!
I've been working with both Stan & PyMC3 on some large datasets and will definitely try Edward on them.
give it a shot at let us know!
please take a look here: http://edwardlib.org/troubleshooting
edward should answer some of your prayers :) there's still some time until stan goes parallel/gpu, though there's lots of interest there.
riemannin hmc is likely just around the corner!