The quantitative heart of the course. These calculators turn the formulas into something you can feel — open them full-screen and drive them live in class.
▶ Open the Interactive SlidesThe signature demo. Sliders for parallel fraction & cores; a live speedup curve that bends toward the S_max = 1/f ceiling. Drag the cores toward infinity and watch it hit the wall.
Enter T(1), T(p), and core count → get speedup, efficiency, and a plain-English verdict on where the missing speedup went.
No installs, no compilers — these run in any modern browser. Real OpenMP / MPI / CUDA code lives in Unit IV (Sessions 10–12).