Results: Minor results reading optimisation with async computation.

src/Model/Geometry/ProfileXYZ.py

@@ -858,11 +858,11 @@ class ProfileXYZ(Profile, SQLSubModel):
 
         return start, list(reversed(end))
 
+    @timer
     def get_water_limits(self, z):
         """
         Determine left and right limits of water elevation.
         """
-
         # Get the index of first point with elevation lesser than water
         # elevation (for the right and left river side)
         i_left = -1
@@ -908,7 +908,8 @@ class ProfileXYZ(Profile, SQLSubModel):
         else:
             pt_right = self.point(self.number_points - 1)
 
-        return pt_left, pt_right
+        # Create a generator to improve results data reading speed
+        yield pt_left, pt_right
 
     def compute_tabulation(self):
         sorted_points = sorted(self._points, key=lambda p: p.z)

src/Model/Results/River/River.py

@@ -14,6 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
+import types
 import struct
 import logging
 import itertools
@@ -74,7 +75,14 @@ class Profile(SQLSubModel):
     def get_ts_key(self, timestamp, key):
         if timestamp in self._data:
             if key in self._data[timestamp]:
-                return self._data[timestamp][key]
+                v = self._data[timestamp][key]
+
+                # If is a generator, compute value(s)
+                if isinstance(v, types.GeneratorType):
+                    v = self._data[timestamp][key] = next(v)
+
+                return v
+
         return None
 
     def has_sediment_layers(self):