Here is a dedicated forum post for keeping track of Nano stress tests.
|2019||Nov||26||48 CPS||40 CPS||Prod||0.4 avg conf time|| |
|2019||Oct||28||400 CPS||89 CPS||Beta||N/A||  |
|2019||Sept||3||N/A||300 CPS||Beta||170ms median conf time|| |
|2019||Aug||1-5||N/A||8 CPS||Prod||4 day test|| |
|2019||Aug||3||25 CPS||N/A||Prod||0.5-0.7 conf times|||
|2019||Jul||10||150 CPS||138 CPS||Beta||N/A|||
|2018||Aug||23||919 TPS*||N/A||Beta||Single node peak|| |
|2018||Aug||17||756 TPS*||75 TPS*||Beta||N/A|||
|2018||Feb||2||40 TPS*||N/A||Prod||N/A|| |
|2018||Jan||N/A||120 TPS*||35 TPS*||Prod||N/A|||
|2018||Jan||N/A||306 TPS*||105 TPS*||Prod||N/A|||
|2017||N/A||N/A||Paper/Lab||Theoretical profile|| |
BPS vs CPS vs TPS
It is important to note that the CPS measurement in Nano is not the exact same thing as the TPS measurement from other cryptocurrencies; CPS/2 is a closer comparison. While Nano transactions do not require a corresponding receive transaction to be considered confirmed (irreversible), there must be a corresponding receive transaction before received funds can be spent again. From the Nano glossary:
- BPS - Blocks Per Second, the transmission rate of unconfirmed blocks (transactions) on the network
- CPS - Confirmations Per Second, the rate of confirmed blocks (send or receive)
- TPS - Transactions Per Second, often used to refer to the rate of complete transactions between two parties (i.e. a send with a corresponding receive, aka CPS/2)
*In the past, TPS was a per-node measurement that represented the perceived network-level transmission rate (BPS), but this measurement was found to be somewhat inaccurate due to peering and propagation differences between nodes. The older stress tests listed in the table don't have CPS data, only the original TPS measurement (aka perceived BPS).
While some of the weaker nodes dropped offline (as expected) during some of these stress tests, the Nano network itself stayed online and functional. One of the biggest issue with testing the production environment is typically generating enough blocks (PoW) to actually stress the network.
Remember that even just 50 TPS (100 CPS) is 4,320,000 transactions per day, and Nano can do that pretty comfortably:
- Bitcoin has never done >500,000 transactions a day
- Ethereum has never done >1.5 million transactions per day
- PayPal (centralized) was only doing ~5 million transactions per day in 2011 with almost 100,000,000 users
Nano is doing really well imo, and I wouldn't be surprised to see a 1,000+ TPS stress test in the next few years.