Cache ip from route conversion

anta/tests/routing/generic.py

@@ -7,7 +7,8 @@
 # mypy: disable-error-code=attr-defined
 from __future__ import annotations
 
-from ipaddress import IPv4Address, ip_interface
+from functools import cache
+from ipaddress import IPv4Address, IPv4Interface
 from typing import ClassVar, Literal
 
 from pydantic import model_validator
@@ -142,14 +143,20 @@ class Input(AntaTest.Input):
         """List of routes to verify."""
 
     def render(self, template: AntaTemplate) -> list[AntaCommand]:
-        """Render the template for each route in the input list."""
+        """Render the template for the input vrf."""
         return [template.render(vrf=self.inputs.vrf)]
 
+    @staticmethod
+    @cache
+    def ip_interface_ip(route: str) -> IPv4Address:
+        """Return the IP address of the provided ip route with mask."""
+        return IPv4Interface(route).ip
+
     @AntaTest.anta_test
     def test(self) -> None:
         """Main test function for VerifyRoutingTableEntry."""
         command_output_vrf = self.instance_commands[0].json_output["vrfs"][self.inputs.vrf]
-        command_output_route_ips = [ip_interface(route).ip for route in command_output_vrf["routes"]]
+        command_output_route_ips = [self.ip_interface_ip(route) for route in command_output_vrf["routes"]]
         missing_routes = [str(route) for route in self.inputs.routes if route not in command_output_route_ips]
 
         if not missing_routes: