The Heat Map plots invocations according to the time and duration of the invocation execution. The plot has time intervals on the x-axis, and duration time intervals on the y-axis in ms. Depending on the interval the invocation falls in, it is plotted accordingly on the respective interval square on the Heat Map. The Legend can be used to understand how many invocations are within a square on the plot, with darker colors indicating a higher number of invocations lying within that interval square. In the illustration above, the Legend indicates that the highest number of invocations that are present in any square is 4; similarly, the least number of invocations in any square is 0.