This graph shows daily distributions of how many rounds and F3 instance took to finalize. A round here corresponds to the round variable in the GossiPBFT pseudocode.
round
The total height of each bar shows the number of instances that were finalized during that particular day. The different colors in each bar show how many instances took how many rounds to finalize. Usually around 50% of instance finalize within the first round. However, it can sometimes take a few more rounds (usually up to six).
Distribution of F3 Rounds per Instance