Operational takes too long to read out

[mattiaswal]

Current Behavior

On a BPI-r3 with a pretty huge configuration with 6-7 SSIDs and a lot of firewall rules etc, it takes ~9s to read out operational. I have added a package to Infix: package/python-spy where you can profile how we unitilze the time. Here are two flame graphs:

No changes:

With lazy imports:

also i could see that yanger saved 1.5s when parallelized ip link and ip addr when reading out ietf-interfaces

other findings: infix-containers takes 0.5s even if no containers exist, same with infix-firewall.

Expected Behavior

Speedy operational

Steps To Reproduce

No response

Additional information

No response