Have you tried rewriting with explicit loops?
- [julia-users] Speeding up Matrix .^ transpose(Vector) Anonymous
- [julia-users] Speeding up Matrix .^ transpose(Vecto... David P. Sanders
- [julia-users] Re: Speeding up Matrix .^ transpo... Steven G. Johnson
- [julia-users] Re: Speeding up Matrix .^ transpose(V... Simon Byrne
