News from last month (2025/10 edition)

Scala/Java

• Understanding Scala Variance
• Performance Improvements in JDK 25 – Inside.java
• Method Tracing · async-profiler/async-profiler · Discussion #1497 · GitHub
• From JDK 21 to JDK 25 - Java Performance Update 2025 – Inside.java
• Reddit - The heart of the internet

Data

• Beyond Indexes: How Open Table Formats Optimize Query Performance — Jack Vanlightly

Other

• Expert Generalists
• Porting InstaBeach to Rust: A 10-Year-Old Play App Goes Serverless - BeachApe.
• GitHub - alvinunreal/awesome-claude: A curated list of awesome things related to Anthropic Claude
• How I Shipped 2 Months of Features in 3 Weeks With LLM Agents