Wraps benchmark (#1862)

- Add wrapper benchmark

pint/registry_helpers.py

@@ -168,14 +168,13 @@ def _converter(ureg, values, strict):
     return _converter
 
 
-def _apply_defaults(func, args, kwargs):
+def _apply_defaults(sig, args, kwargs):
     """Apply default keyword arguments.
 
     Named keywords may have been left blank. This function applies the default
     values so that every argument is defined.
     """
 
-    sig = signature(func)
     bound_arguments = sig.bind(*args, **kwargs)
     for param in sig.parameters.values():
         if param.name not in bound_arguments.arguments:
@@ -254,7 +253,8 @@ def wraps(
         ret = _to_units_container(ret, ureg)
 
     def decorator(func: Callable[..., Any]) -> Callable[..., Quantity]:
-        count_params = len(signature(func).parameters)
+        sig = signature(func)
+        count_params = len(sig.parameters)
         if len(args) != count_params:
             raise TypeError(
                 "%s takes %i parameters, but %i units were passed"
@@ -270,7 +270,7 @@ def decorator(func: Callable[..., Any]) -> Callable[..., Quantity]:
 
         @functools.wraps(func, assigned=assigned, updated=updated)
         def wrapper(*values, **kw) -> Quantity:
-            values, kw = _apply_defaults(func, values, kw)
+            values, kw = _apply_defaults(sig, values, kw)
 
             # In principle, the values are used as is
             # When then extract the magnitudes when needed.
@@ -335,7 +335,8 @@ def check(
     ]
 
     def decorator(func):
-        count_params = len(signature(func).parameters)
+        sig = signature(func)
+        count_params = len(sig.parameters)
         if len(dimensions) != count_params:
             raise TypeError(
                 "%s takes %i parameters, but %i dimensions were passed"
@@ -351,7 +352,7 @@ def decorator(func):
 
         @functools.wraps(func, assigned=assigned, updated=updated)
         def wrapper(*args, **kwargs):
-            list_args, empty = _apply_defaults(func, args, kwargs)
+            list_args, empty = _apply_defaults(sig, args, kwargs)
 
             for dim, value in zip(dimensions, list_args):
                 if dim is None:

pint/testsuite/benchmarks/test_20_quantity.py

@@ -53,3 +53,39 @@ def test_op2(benchmark, setup, keys, op):
     _, data = setup
     key1, key2 = keys
     benchmark(op, data[key1], data[key2])
+
+
+@pytest.mark.parametrize("key", ALL_VALUES_Q)
+def test_wrapper(benchmark, setup, key):
+    ureg, data = setup
+    value, unit = key.split("_")
+
+    @ureg.wraps(None, (unit,))
+    def f(a):
+        pass
+
+    benchmark(f, data[key])
+
+
+@pytest.mark.parametrize("key", ALL_VALUES_Q)
+def test_wrapper_nonstrict(benchmark, setup, key):
+    ureg, data = setup
+    value, unit = key.split("_")
+
+    @ureg.wraps(None, (unit,), strict=False)
+    def f(a):
+        pass
+
+    benchmark(f, data[value])
+
+
+@pytest.mark.parametrize("key", ALL_VALUES_Q)
+def test_wrapper_ret(benchmark, setup, key):
+    ureg, data = setup
+    value, unit = key.split("_")
+
+    @ureg.wraps(unit, (unit,))
+    def f(a):
+        return a
+
+    benchmark(f, data[key])