slightly optimize tool function `equivalent_units`

benchmarks/data/test_tools.py

@@ -226,11 +226,20 @@ class TestUnitsTools(unittest.TestCase):
         _result = self.benchmark(is_quantified, xdata=xdata)
 
     @pytest.mark.benchmark(group="data-tools")
-    def test_equivalent_units(self):
+    def test_equivalent_units_true(self):
         time = dt.datetime(2000, 1, 1)
         info = fm.Info(time=time, grid=fm.UniformGrid((2, 1)), units="mm")
         xdata = full(0.0, "test", info, time)
-        _result = self.benchmark(equivalent_units, unit1=xdata, unit2="L/m^2")
+        result = self.benchmark(equivalent_units, unit1=xdata, unit2="L/m^2")
+        self.assertTrue(result)
+
+    @pytest.mark.benchmark(group="data-tools")
+    def test_equivalent_units_False(self):
+        time = dt.datetime(2000, 1, 1)
+        info = fm.Info(time=time, grid=fm.UniformGrid((2, 1)), units="mm")
+        xdata = full(0.0, "test", info, time)
+        result = self.benchmark(equivalent_units, unit1=xdata, unit2="m")
+        self.assertFalse(result)
 
     @pytest.mark.benchmark(group="data-tools")
     def test_compatible_units(self):

src/finam/data/tools.py

@@ -686,8 +686,10 @@ def equivalent_units(unit1, unit2):
         Unit equivalence.
     """
     unit1, unit2 = _get_pint_units(unit1), _get_pint_units(unit2)
-    ratio = ((1 * unit1) / (1 * unit2)).to_base_units()
-    return ratio.dimensionless and np.isclose(ratio.magnitude, 1)
+    try:
+        return np.isclose((1.0 * unit1).to(unit2).magnitude, 1.0)
+    except pint.errors.DimensionalityError:
+        return False
 
 
 def assert_type(cls, slot, obj, types):