I'm just wondering how long it would take an average full bitcoin node to find the latest block compared to the main blockchain explorers.

This is because I'm planning on using the bitcoin node to get information about new blocks, and it needs to be relatively fast.

I'd test it myself, but my internet is slow, and I don't want to have to buy a VPS until I'm sure that I want to do it this way.

Thanks.

Every so often I see that some miners only confirm their own transaction, instead of confirming as many as possible, meaning they'd lose out on the extra BTC from the fees.

Here's an example from block 646643: https://mempool.space/block/00000000000000000003df4d47029e345e693663c0c28ad6aa44523d5f5f821f

Does anyone know why they do this? Are they just being lazy and don't want to hash the entire block or something?

Thanks.

The blog linked below claims that what they're doing is called double spending, but I always thought that it was done a different way.

https://blog.blockonomics.co/how-to-double-spend-bitcoin-using-electrum-no-technical-sorcery-required-78799b07cad7

Does anyone know if that is actually known as double spending?

Hey guys, I'm just wondering what the proper term for this scenario below is.

1) Person 1 sends some bitcoin to Person 2 with a deliberately small fee so it never gets confirmed.
2) The bitcoin eventually gets returned to Person 1 as the fee was too low.

I've seen some people on another forums calling it double spending, but I'm pretty sure that's not what it is.

Thanks!