Profile: Create cache for 'get_water_limits' results.

src/Model/Geometry/ProfileXYZ.py

@@ -91,6 +91,8 @@ class ProfileXYZ(Profile, SQLSubModel):
         self._station = []
         self.station_up_to_date = False
 
+        self._get_water_limits_cache = {}
+
     @classmethod
     def _db_create(cls, execute, ext=""):
         execute(f"""
@@ -868,6 +870,9 @@ class ProfileXYZ(Profile, SQLSubModel):
         i_left = -1
         i_right = -1
 
+        if z in self._get_water_limits_cache:
+            return self._get_water_limits_cache[z]
+
         for i in range(self.number_points):
             if self.point(i).z <= z:
                 i_left = i
@@ -908,6 +913,9 @@ class ProfileXYZ(Profile, SQLSubModel):
         else:
             pt_right = self.point(self.number_points - 1)
 
+        # Put results in cache
+        self._get_water_limits_cache[z] = (pt_left, pt_right)
+
         # Create a generator to improve results data reading speed
         yield pt_left, pt_right