The only issue is the loading speed of the btcpayser, it takes 20 seconds to load the tips page and a further 20 seconds to load a LN invoice. A faster reverse tor proxy, or a more powerful machine running BTCPayServer would help, but tor is probably the bottleneck.
I have a similar setup and usually experience a delay, though I'd say closer to 5s on average. It must be partly tor. It seems worth it to me, but 40s total is bad.
Thanks, useful to know 5s is possible
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