Added ASV benchmark for Contacts analysis

Author: Amarendra22

benchmarks/benchmarks/analysis/contacts.py

@@ -0,0 +1,27 @@
+import MDAnalysis as mda
+from MDAnalysis.analysis import contacts
+from MDAnalysisTests.datafiles import PSF, DCD
+
+
+class ContactsBench:
+
+    params = [4.5, 6.0]
+    param_names = ["radius"]
+
+    def setup(self, radius):
+        self.u = mda.Universe(PSF, DCD)
+        self.sel1 = "protein"
+        self.sel2 = "name CA"
+
+        g1 = self.u.select_atoms(self.sel1)
+        g2 = self.u.select_atoms(self.sel2)
+
+        self.analysis = contacts.Contacts(
+            self.u,
+            select=(self.sel1, self.sel2),
+            refgroup=(g1, g2),
+            radius=radius,
+        )
+
+    def time_contacts_run(self, radius):
+        self.analysis.run()