How does the wallet sync so fast given that the Blockchain is a few years old? I downloaded the wallet and it was ready in less than an hour. This is a Blockchain that dates back a few years so I’m curious as to how this is done. 

I’ve been looking at Monero which takes days to load and has an extremely clunky UI. This is quite refreshing and I’m just curious as to how it’s done on a technical level. 