TLDR

TLDR Data 2026-07-20

Inside Spark 4.2 ✨, Data Modeling Still Matters πŸ“, Faster Spark With Rust πŸ¦€

Your agent is failing to fetch web data; the average failure rate for hard-target web fetches is 40%. Ours is 4%. (Sponsor)

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Deep Dives

Exploring Hierarchical Interest Representation For Meta Ads Deep Funnel Optimization (8 minute read)

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Opinions & Advice

Data Modeling isn't Dead, You Just Stopped Doing It with Joe Reis (65 minute video)

Agents think in milliseconds, legacy infrastructure doesn't. LinkedIn, Walmart, and Zendesk shared how they closed the gap at VB Transform 2026 (4 minute read)

AI Agents Need Data Product Context Not More RAG (11 minute read)

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Launches & Tools

Introducing Apache Spark 4.2 (6 minute read)

Ontology Playground (GitHub Repo)

Postgres 19 Compression: from pglz to LZ4 (8 minute read)

Experience Graphs: The Data Foundation for Self-Improving Agents (28 minute read)

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Miscellaneous

In-House LLM Serving at Netflix (7 minute read)

From Weeks to a Day: How We Made LLM Evaluation Fast Enough to Iterate on (10 minute read)

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