I posted previously (here) about an Arduino speed test I did with the Uno board. The rate that it could print the time, a comma, and an analogRead value was about 1150 Hz. I just got my hands on a Leonardo board, and wanted to run the same code to compare. The Getting Started Guide details how the serial buffer is likely to fill up fast and result in a visible lag in the serial monitor window. It suggests adding a delay, but I don’t want to do that, so I went into CoolTerm to try to read the data. The same code got me a rate of about 1370 Hz! So with this simple test, it looks like the Leonardo is about 20% faster than the Uno on this sketch. I’ll take it.