Stop Guessing Buffer Sizes. You’re Trying to Solve an Impossible Problem.
Font rendering hides a circular dependency: you need memory to compute glyph metrics, but you need glyph metrics to know how much memory to allocate. This ouroboros of logic isn’t just a font problem — it’s a structural pattern identical to halting-problem-adjacent issues in systems design. Perfect pre-allocation is provably impossible, forcing every developer to choose their compromise deliberately.