how long to get notice? should I use LND?

how long to get notice? should I use LND?

I'm doing RPC calls to bitcoind from node.js. example:

rpc.call('getreceivedbyaddress', [ address, 0 ], (error, result) => { // do stuff })

my question is, how long will it take for my bitcoind to actually get a notification? 0 confirmations should be quick, correct? Can anyone estimate approximately how long? is there a better way I should be checking for transactions to the bitcoind wallet? 0 confirmations is fine. it's for SaaS service. If later on the payment doesn't confirm I can just disable their account - no harm done.

thanks!

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