I am not sure what you are trying to do here.
If you feed tinyG a Gcode file that contains 25 short segments that follow an arc, the motion planner will convert that to seemingly continuous moves at a rate bounded by your F speed (for G1 moves) or Vmax for G0 moves.
You will not perceive 25 incremental moves if they were along a continuous arc.
If, on the other hand, you defined a Gcode file that moved following a square, the motion planner would nearly stop at every corner then change direction and continue.
You need to describe a bit more what you are doing
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