diff --git a/src/Model/Geometry/ProfileXYZ.py b/src/Model/Geometry/ProfileXYZ.py
index 0ed81688..6a863fcb 100644
--- a/src/Model/Geometry/ProfileXYZ.py
+++ b/src/Model/Geometry/ProfileXYZ.py
@@ -92,6 +92,7 @@ class ProfileXYZ(Profile, SQLSubModel):
         self.station_up_to_date = False
 
         self._get_water_limits_cache = {}
+        self._get_water_limits_ac_cache = {}
 
     @classmethod
     def _db_create(cls, execute, ext=""):
@@ -621,6 +622,7 @@ class ProfileXYZ(Profile, SQLSubModel):
         """
         return [x for x in lst if not np.isnan(x)]
 
+    @timer
     def speed(self, q, z):
         area = self.wet_area(z)
 
@@ -672,6 +674,7 @@ class ProfileXYZ(Profile, SQLSubModel):
             length += line.length
         return length
 
+    @timer
     def compute_wet_area(self, z):
         area = 0.0
         if len(self.tab.L) > 0:
@@ -712,6 +715,7 @@ class ProfileXYZ(Profile, SQLSubModel):
                 if len(line.coords) > 2:
                     poly = geometry.Polygon(line)
                     area += poly.area
+
         return area
 
     def wet_radius(self, z):
@@ -734,6 +738,7 @@ class ProfileXYZ(Profile, SQLSubModel):
         line = geometry.LineString(list(zip(station, zz)))
         return line
 
+    @timer
     def wet_lines(self, z):
         points = self._points
         if len(points) < 3:
@@ -810,7 +815,6 @@ class ProfileXYZ(Profile, SQLSubModel):
         return points
 
     def get_nb_wet_areas(self, z):
-
         n_zones = 0
         points = self._points
         if points[0].z <= z:
@@ -822,10 +826,13 @@ class ProfileXYZ(Profile, SQLSubModel):
 
         return n_zones
 
+    @timer
     def get_all_water_limits_ac(self, z):
         """
         Determine all water limits for z elevation.
         """
+        if z in self._get_water_limits_ac_cache:
+            return self._get_water_limits_ac_cache[z]
 
         points = self._points
         if len(points) < 3:
@@ -858,10 +865,19 @@ class ProfileXYZ(Profile, SQLSubModel):
             logger.error(f"ERROR in get_all_water_limits_ac")
             return [], []
 
-        return start, list(reversed(end))
+        res = start, list(reversed(end))
+        self._get_water_limits_ac_cache[z] = res
+
+        return res
 
     @timer
     def get_water_limits(self, z):
+        if z in self._get_water_limits_cache:
+            return self._get_water_limits_cache[z]
+
+        return self.get_water_limits_compute(z)
+
+    def get_water_limits_compute(self, z):
         """
         Determine left and right limits of water elevation.
         """
@@ -870,9 +886,6 @@ 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
@@ -919,15 +932,20 @@ class ProfileXYZ(Profile, SQLSubModel):
         # Create a generator to improve results data reading speed
         yield pt_left, pt_right
 
+    @timer
     def compute_tabulation(self):
         sorted_points = sorted(self._points, key=lambda p: p.z)
+
         self.tab.z = np.array([p.z for p in sorted_points], np.float64)
         self.tab.L = np.zeros(len(self.tab.z), np.float64)
         self.tab.A = np.zeros(len(self.tab.z), np.float64)
+
         for i in range(1, len(self.tab.z)):
             self.tab.L[i] = self.compute_wet_width(self.tab.z[i])
+
             dx = (self.tab.L[i] + self.tab.L[i-1])/2
             dz = self.tab.z[i] - self.tab.z[i-1]
+
             self.tab.A[i] = self.tab.A[i-1] + dz * dx
 
         self.tab_up_to_date = True