bgpd: non pretty json output for neighbor routes

Currently, json output of show BGP commands are no pretty format.

This is an extremely expensive operation for huge scale (lots of
routes with lots of paths).

BGP json non-pretty commands support added:

```
show bgp neighbors <nbr-id> advertised-routes json
show bgp neighbors <nbr-id> received-routes json
show bgp neighbors <nbr-id> advertised-routes detail json
show bgp neighbors <nbr-id> received-routes detail json
```

Ticket:#3513256
Issue:3513256

Testing: UT done

Signed-off-by: Sindhu Parvathi Gopinathan's <sgopinathan@nvidia.com>

diff --git a/bgpd/bgp_route.c b/bgpd/bgp_route.c
index 4e83b36fe0b87d38c0b7b2b2f6b8ad54b03343a4..5f923c598fb09d7478904cbd3614f00b1fd6dce0 100644 (file)
--- a/bgpd/bgp_route.c
+++ b/bgpd/bgp_route.c
@@ -14639,8 +14639,12 @@ CPP_NOTICE("Drop `bgpOriginCodes` from JSON outputs")
                        json_object_free(json_ocode);
                }
 
-               vty_json(vty, json);
-       } else if (output_count > 0) {
+                /*
+                 * This is an extremely expensive operation at scale
+                 * and non-pretty reduces memory footprint significantly.
+                 */
+                vty_json_no_pretty(vty, json);
+        } else if (output_count > 0) {
                if (!match && filtered_count > 0)
                        vty_out(vty,
                                "\nTotal number of prefixes %ld (%ld filtered)\n",