You can. Here is my version: <https://godbolt.org/z/91KecEfbM>

Results:

   N = 10000
  range 1218.1
  sentinel 937.258
  mine 672.227
  ratio 1.29964

(ratio is range/sentinel, not mine/whatever)

You can get even more crazy with SIMD. But for all that you need to know the length beforehand.

Edit: The b4 variable should actually be called b8. That's a remnant of a previous version, where I used 32-bit chunks.