perf: compute hash of a tuple instead summing up multiple hashes

apps/hiopy/_grids.py

@@ -32,12 +32,7 @@ def grid_id(var):
     if "coordinates" in crs.attrs:
         try:
             lon, lat = crs.attrs["coordinates"].split(" ")
-            s = hash(
-                hash(str(zgroup[lat][:]))
-                + hash(str(zgroup[lon][:]))
-                + var_group
-                + spatial_chunk_shape
-            )
+            s = hash((str(zgroup[lat][:]), str(zgroup[lon][:]), var_group, spatial_chunk_shape))
             return s
         except Exception as e:
             raise RuntimeError("Cannot parse coordinates") from e