Three finders, each model call sleeps 300 ms.

  #27            start    0 ms  end  301 ms
  #31            start    1 ms  end  302 ms
  #29            start    0 ms  end  302 ms

Distinct threads: 3
Wall clock for the whole sequence: 320 ms (sequential would be at least 900 ms)
Plan: Fly AI-101, stay at Hotel Alfama, ride Tram 28.