Reduce number of dummy backends

Author: TLouf

asv_bench/benchmarks/plotting.py

@@ -9,7 +9,6 @@
     DataFrame,
     DatetimeIndex,
     Series,
-    __file__ as pd_file,
     date_range,
 )
 
@@ -113,11 +112,6 @@ class BackendLoading:
 
     def setup(self):
         dist = pkg_resources.get_distribution("pandas")
-        if dist.module_path not in pd_file:
-            # We are running from a non-installed pandas, and this benchmark is
-            # invalid
-            raise NotImplementedError("Testing a non-installed pandas")
-
         spec = importlib.machinery.ModuleSpec("my_backend", None)
         mod = importlib.util.module_from_spec(spec)
         mod.plot = lambda *args, **kwargs: 1
@@ -127,7 +121,7 @@ def setup(self):
             "pandas_plotting_backend", mod.__name__, dist=dist
         )
         backends["pandas_plotting_backends"][mod.__name__] = my_entrypoint
-        for i in range(1000):
+        for i in range(10):
             backends["pandas_plotting_backends"][str(i)] = my_entrypoint
         sys.modules["my_backend"] = mod