> but this is the best balance of speed and accuracy Well, you don’t need to load them all at once, make lazy load, every 10 loaded once. > The only way to gu

> but this is the best balance of speed and accuracy Well, you don’t need to load them all at once, make lazy load, every 10 loaded once. > The only way to guarantee availability is a WHOIS lookup, which takes 50ms+ per domain, I remember I used a site before that check domains in the fly and it was fast, it didn’t load everything at once so probably that’s the trick.