Quote from: konfuzius5278 on August 22, 2018, 12:02:16 PM

The reason I do this discussion is that people dont want to hear about other crypto for payment. I dont understand

Then you, merchant, payment processor or payment gateway should consider use/accept zero-confirmation, it's not too risky if it's for small payment and any explorer/nodes don't detect double-spend attempt (with sufficient fee obviously).
CPFP also help if you want to use your bitcoin immediately.

Quote from: aliashraf on August 22, 2018, 10:15:31 PM

Quote from: achow101 on August 22, 2018, 09:34:03 PM

Quote from: konfuzius5278 on August 17, 2018, 03:17:55 PM

Someone with good statics knowlege could calculate how average the block time is really. So normally it should be a Gauss normal distribution with the maximum at 10 mins. But it is not, cause e.g. miners are activated or deactivated and difficulty can not react. Look how many blocks are found exactly 10 mins after the last one or even 11 or 9 min.

There is no maximum on the time between blocks, so there is no maximum at 10 minutes. The distribution time between blocks is not a normal distribution. Rather it is poisson with the true mean at ~9.7 minutes. The difficulty adjusts to make it 10 minutes, but new hardware coming online pulls the time down. Since it is poisson, the time can vary a lot, from 0 minutes to several hours, there is no maximum at 10 minutes.

The true mean for bitcoin since genesis block up to now, is ~9.4 minutes last time I calculated this divergence. How did you get 9.7?

AFAIK that was mean in few years ago. My rough calculation also show 9.4 minutes mean time.