Set cache size and ORDER to something reasonable and make the dump_cache call only work in verbose (is was using the most time)
Adding mode param to db_open_files: r+ for read/write, a for just append (which is what mostly happene when generating a next generation) to avoid fseek() calls which are slow
Braggin about speed difference with the node cache
No point in initing a board to 0 when copy_board sets stuff anyway
Printing some settings and better cache defaults