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Is there a certain website or a study that gives an estimation for the ratio f = Propagation Delay/Block Interval for the Bitcoin network ? I know the Block Interval is roughly 10 minutes however, I don't know the propagation delay. I define it as the time it takes for all nodes to hear about a mined block after it's been broadcast.
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As mentioned by Ethan Heilman here:
According the paper 'Information propagation in the bitcoin network.' by Decker and Wattenhofer. The mean time for a node to see a block is 12.6 seconds, after 40 seconds 95% of the nodes have seen that block.
From my personal experience as a developer, this delay is real and noticeable. Some block explorers catch transactions ~20-30 seconds before others. It may be scary at first but its normal.
This is unrelated. Transaction relay is deliberately slowed down in order to improve privacy (to hide the source of a transaction, random delays are added). This is not the case for block propagation which is very optimized to be as fast as possible. – Pieter Wuille – 2018-04-02T18:26:29.317
He asked about propagation times. – Monstrum – 2018-04-04T02:06:21.367
I assume he means propagation time of blocks. Transaction relay time is not relevant for network convergance. But you're right, it is a guess. – Pieter Wuille – 2018-04-04T02:22:57.673
Probably related: https://bitcoin.stackexchange.com/q/10821/31712
– Sergei Tikhomirov – 2017-11-28T12:59:14.540