This post was originally published on my website.In our fast-paced world, there are many systems that we expect to be fast. One such system is payments: when you buy something, the last thing you want is to be waiting for a minute with a freezing jug of milk in your hand! First, let’s define what I mean by “scalability.” In this article, I will define it using two metrics: latency, meaning the time it takes from when you submit a transaction to when it clears, and transactions per second, or ...