Fastest possible sync for development purposes

[dav1app]

Hi everybody,

I'm seeking to use lnd Docker image for testing purposes. It will monitor future transactions after lnd is launched, using RPC. One of the requirements is that the node should be ephemeral - I can easily create and destroy the docker images, so I'm struggling with sync.

How can I achieve the fastest possible sync/startup time? No need to use any historical data or anything prior.

Currently, I'm trying with this. Neutrino isn't mandatory.

  lnd-testnet:
    image: lightninglabs/lnd:v0.17.0-beta.rc4
    command:
      - "--bitcoin.active"
      - "--bitcoin.testnet"
      - "--bitcoin.node=neutrino"
      - "--neutrino.maxpeers=1"
      - "--routing.assumechanvalid"
      - "--rpclisten=0.0.0.0:10009"

[bitromortac]

Is it a requirement to be on testnet/mainnet? I think the bottleneck will be to get the gossip synced. A solution there could be to use https://lightning.engineering/api-docs/api/lnd/dev/import-graph. Even on regtest the limit is on the order of 5-10s until lnd is operational.