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A short history of Parquet, then two experiments on one day of Ethereum logs: how bloom filters speed up lookups on a high-cardinality column, and how sorting and compression shrink a 1.2 GB file to 218 MB.

Today I learned that manholes are round because of 'curves of constant width' — a mathematical concept Euler discovered in 1771, 100 years before engineers needed it.

The Universal Commerce Protocol shifts the integration model for AI-driven commerce. The buyer journey is moving from storefront pages to agent interfaces — and that changes everything for merchants, platforms, and third-party apps alike.

Vietnam excels at the "campaign" mindset — sprinting, hustling, winning battles. But to build lasting global tech companies, we need to shift from finite games to infinite ones.

How X transforms raw ML predictions into a polished, personalized feed — the four-scorer chain, 10 pre-scoring filters, and the waterfall that reduces ~200 candidates to ~40 ranked posts.