message: improved configuration for CPU execution (experimentally determined)
diff: }
  },
  "settings": {
  - "vec_size": 16,
  - "mem_width": 64,
  - "use_global": false,
  - "max_regs": 8192
  + "vec_size": 32,
  + "mem_width": 4096,
  + "use_global": true,
  + "max_regs": 8192,
  + "max_mem": 8192,
  + "goal_flops_per_byte": 20
  }
  },
  {
  },
  "settings": {
  "threads": 32,
  - "vec_size": 1,
  + "vec_size": 16,
  "mem_width": 64,
  "max_mem": 32768,
  "max_regs": 32768
  