Quote from: TPTB_need_war on June 12, 2015, 01:24:09 AM

Quote from: molecular on June 11, 2015, 09:28:18 PM

Quote from: sidhujag on June 11, 2015, 09:18:11 PM

bitshares claims 100k TPS with ease.. very likely 1000k that is possible with todays avg personal computer:

https://bitshares.org/blog/2015/06/08/measuring-performance/

I don't read that as them "claiming 100k TPS". They identified serially having to write utxo set as the bottleneck and they estimated a high-end server could do 100k TPS on that problem.

Bandwidth is the bottle neck to scaling block size decentralized on home connections.

https://en.bitcoin.it/wiki/Scalability#Network

100,000 x 0.5 KB = 400 Mbps connection at least.

http://www.nngroup.com/articles/law-of-bandwidth/

Quote

a high-end user's connection speed grows by 50% per year

With internet connections in many countries still below 5 Mbps download (and consistent download rates are lower than that), that means 10 years or more to scale to that level. And to achieve micropayments a single order-of-magnitude increase over Visa scale is not likely sufficient. My guess would be 2 - 3 orders-of-magnitude within the first 10 years after launch.

Also bear in mind that perhaps 90% of the world doesn't yet use a credit card for internet purchases, so Visa scale 10 years from now is likely to be closer to 100,000 TPS.

Bottom line is crypto-currency can't scale by having every node see every transaction. Also it is an enormous unnecessary waste of internet bandwidth and there are many other reasons such a design is not desired.

In bts avg size of tx is 100 bytes thus 10MBps bandwidth needed which is doable TODAY. In your example it's 4000Mbps for 0.5kB blocks
So your design doesn't use a blockchain, strictly p2p? The Bitcoin ala BitTorrent?