He added a comment to the new codebase, right above the using statement:
Arjun needed a different pattern.
EPPlus, like all great libraries, had taught him a deeper lesson: EPPlus abstracts away the horror of Open XML’s SharedStringTable and CellValue types, but it cannot abstract away memory. The “deep story” isn’t about Excel—it’s about the gap between what we ask computers to hold and what they can actually hold. epplus
Processing: 63,000 rows. 24 columns. Formulas that referenced only the current row. No inter-sheet dependencies. Time to generate: 1.2 seconds. Peak memory: 142 MB. He added a comment to the new codebase,