ebarash:
pulses per second will not be true if you unable those lines!
You don't need a 1 second interval to know the pulse rate. All you need to know is the interval between two pulses (or the interval between a larger number if you want an average.
And even if you do want to show the data once per second the rest of your program does not have to be limited to once per second.
Rather than pick small holes in specific pieces of code that were just prepared as a typical example why not tell us exactly what you want to achieve?
...R