⚡️ Optimize G2-G3 Arcs (#24366)

Marlin/src/module/planner_bezier.cpp

@@ -121,6 +121,9 @@ void cubic_b_spline(
 
   millis_t next_idle_ms = millis() + 200UL;
 
+  // Hints to help optimize the move
+  PlannerHints hints;
+
   for (float t = 0; t < 1;) {
 
     thermalManager.task();
@@ -177,7 +180,7 @@ void cubic_b_spline(
       }
     */
 
-    step = new_t - t;
+    hints.millimeters = new_t - t;
     t = new_t;
 
     // Compute and send new position
@@ -203,7 +206,7 @@ void cubic_b_spline(
       const xyze_pos_t &pos = bez_target;
     #endif
 
-    if (!planner.buffer_line(pos, scaled_fr_mm_s, active_extruder, step))
+    if (!planner.buffer_line(pos, scaled_fr_mm_s, active_extruder, hints))
       break;
   }
 }