Solving
Optimisation technique: cost, cycles and footprint, and the trades between them.
Why your first solution is never the best one
In an optimisation puzzle the game starts after you solve it. Here is why the first working answer is only a draft, and how the compression pass actually works.
Cost versus speed versus space in puzzle games
Why no single solution wins on cost, speed and space at once, what a Pareto front is, and how to read one, using the three-way squeeze at the heart of 5q0.