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repro_with_collection.py
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cr0ntab
May 1 2026, 3:58 PM
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repro_with_collection.py
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#!/usr/bin/env python3
"""
Collection-level reproducer. Times Route_mapsTemplate14.parse() end-to-end.
Requires the vyos.vyos collection to be installed and importable
(default install location: ~/.ansible/collections/ansible_collections/vyos/vyos).
1. Builds a 12-line config (rule-lines under several route-maps).
2. Calls Route_mapsTemplate14(...).parse(), which is the same
call vyos_route_maps' facts module makes during state=gathered
or state=merged.
3. Times it.
Run:
ANSIBLE_COLLECTIONS_PATHS=~/.ansible/collections \
python3 repro_with_collection.py
"""
import os
import sys
import time
# Discover the installed collection. Adjust if you put it elsewhere.
candidates = [
os.path.expanduser("~/.ansible/collections"),
"/usr/share/ansible/collections",
]
for c in candidates:
if os.path.isdir(os.path.join(c, "ansible_collections/vyos/vyos")):
sys.path.insert(0, c)
break
else:
sys.exit("Could not find ansible_collections/vyos/vyos under any of: "
+ ", ".join(candidates))
from ansible_collections.vyos.vyos.plugins.module_utils.network.vyos.rm_templates.route_maps_14 import ( # noqa: E402
Route_mapsTemplate14,
)
CONFIG = """\
set policy route-map ADVERTISE-ANYCAST-v6 rule 10 action 'permit'
set policy route-map ADVERTISE-ANYCAST-v6 rule 10 match ipv6 address prefix-list 'ANYCAST-AGGREGATE-v6'
set policy route-map DEFAULT-ORIGINATE-SENTINEL-v6 rule 10 action 'permit'
set policy route-map DEFAULT-ORIGINATE-SENTINEL-v6 rule 10 match ipv6 address prefix-list 'AS64496-SENTINEL-v6'
set policy route-map DEFAULT-ORIGINATE-SENTINEL-v6 rule 10 set local-preference '120'
set policy route-map IXP-PEER-IN rule 10 action 'permit'
set policy route-map IXP-PEER-IN rule 10 match ip address prefix-list 'IXP-INBOUND-v4'
set policy route-map IXP-PEER-IN rule 10 set community 'additive 65000:100'
set policy route-map TRANSIT-OUT rule 100 action 'permit'
set policy route-map TRANSIT-OUT rule 100 match ip address prefix-list 'CUSTOMER-AGGREGATES-v4'
set policy route-map TRANSIT-OUT rule 100 set as-path prepend '65000 65000'
set policy route-map UPSTREAM-IN-v4 rule 10 action 'permit'
"""
def main():
lines = CONFIG.strip().splitlines()
print(f"input: {len(lines)} lines, {sum(len(l) for l in lines)} chars")
print(f"PARSERS in Route_mapsTemplate14: {len(Route_mapsTemplate14.PARSERS)}")
parser = Route_mapsTemplate14(lines=lines)
t0 = time.perf_counter()
result = parser.parse()
dt = time.perf_counter() - t0
n_route_maps = len(result.get("route_maps", {}))
print(f"parse() elapsed: {dt:.2f}s (returned {n_route_maps} route_maps)")
print()
if dt > 5:
print("Bug reproduced: parse() should finish in <0.1s.")
else:
print("parse() finished quickly. Either the collection is patched, or")
print("the route-map names in this input are too short to trigger the")
print("slowdown. Try names of 20+ characters.")
if __name__ == "__main__":
main()

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