Develop a time per iteration plotter

[jorgepiloto]

💻 Feature request: time performance plotter

As similar to #9, the idea here is to show the time per iteration instead of the number of iterations. However, some points need to be considered:

• The time it takes for a computer to execute a particular piece of code is influenced by both the implementation and the rest of the processes running in the machine. This is the reason behind why benchmarks execute the task several times and then compute the average value.

I think it should be possible to adapt the code from IterationsPlotter and adapt it to this new plotter.

[jorgepiloto]

Finally solved! As always, suggestions and bugs will appear as time evolves. Closing this 🚀