DTF:HN for June 19, 2026

Your Daily Tech Feed covering the top 10 stories on Hacker News for June 19, 2026. Featuring: Project Valhalla, Explained: How a Decade of Work Arrives in JDK 28, DuckDB Internals: Why Is DuckDB Fast? (Part 1), To study how chips work, MIT researchers built their own operating system, So You Want to Define a Well-Known URI, Ten years of ClickHouse in open source, and more. Stories covered: 1. Project Valhalla, Explained: How a Decade of Work Arrives in JDK 28 https://www.jvm-weekly.com/p/project-valhalla-explained-how-a HN discussion: https://news.ycombinator.com/item?id=48595511 2. DuckDB Internals: Why Is DuckDB Fast? (Part 1) https://www.greybeam.ai/blog/duckdb-internals-part-1 HN discussion: https://news.ycombinator.com/item?id=48553388 3. To study how chips work, MIT researchers built their own operating system https://news.mit.edu/2026/to-study-how-chips-really-work-mit-researchers-built-their-own-operating-system-0610 HN discussion: https://news.ycombinator.com/item?id=48543311 4. So You Want to Define a Well-Known URI https://mnot.net/blog/2026/well_known_uris HN discussion: https://news.ycombinator.com/item?id=48595331 5. Ten years of ClickHouse in open source https://clickhouse.com/blog/open-source-10 HN discussion: https://news.ycombinator.com/item?id=48546890 6. Gribouille 0.3.0: A Grammar of Graphics for Typst https://mickael.canouil.fr/posts/2026-06-15-gribouille-0-3/ HN discussion: https://news.ycombinator.com/item?id=48541062 7. I found 10k GitHub repositories distributing Trojan malware https://orchidfiles.com/github-repositories-distributing-malware/ HN discussion: https://news.ycombinator.com/item?id=48583928 8. Zen and the Art of Machine Learning Research https://blog.jxmo.io/p/zen-and-the-art-of-machine-learning HN discussion: https://news.ycombinator.com/item?id=48549118 9. The Raku Foundation is born https://raku.foundation HN discussion: https://news.ycombinator.com/item?id=48541940 10. Zero-Touch OAuth for MCP https://blog.modelcontextprotocol.io/posts/enterprise-managed-auth/ HN discussion: https://news.ycombinator.com/item?id=48592163