October 2025 Java Application Debugging Story by Rajin (Translated from Korean) “It's time to replace Parquet” by Vu Trinh %CPU Utilization Is A Lie by Brendan Long The best way I know to work around this is to run benchmarks and monitor actual work done:
Benchmark how much work your server can do before having errors or unacceptable latency. Report how much work your server is currently doing. Compare those two metrics instead of CPU utilization.
How Netflix Uses Java - 2025 Edition by Paul Bakker Impressive things.
Virtual Threads Web MVC or WebFlux Comparison GraphQL Flexible schema to query data Think in “data”, not in “methods” gRPC Highly performant Server-to-Server calls Think “methods”, not “data” REST 🪦
Using External Indexes, Metadata Stores, Catalogs and Caches to Accelerate Queries on Apache Parquet by Andrew Lamb (InfluxData) Embedding User-Defined Indexes in Apache Parquet Files by Qi Zhu (Cloudera), Jigao Luo (Systems Group at TU Darmstadt), and Andrew Lamb (InfluxData) Apache DataFusion 49.0.0 Released Highlights I found impressive
Dynamic Filters and TopK pushdown Async User-Defined Functions (ask_llm?!) Better Cancellation for Certain Long-Running Queries
Index Performance Concurrency Generics Reiaibility Others Performance We tried Go's experimental Green Tea garbage collector and it didn't help performance by Zach Musgrave Parsing Protobuf Like Never Before by mcyoung Deep dive into a go binary by JesĂşs Espino If you want to know how high performance systems written in Go were built, read VictoriaLogs: https://github.com/VictoriaMetrics/VictoriaLogs by Phuong Le Custom bloom filters to reduce disk I/O and CPU cycles for redundant logs.
I still remember learning to sail during my days as a midshipman. One moment stands out clearly: opening the sail and feeling the wind take hold, pushing the boat forward. Unlike rowing, where every stroke relies on your own strength, sailing carried me farther than I could ever go alone, lifted and driven by the power of the wind.
But the wind wasn't always kind. Without warning, the boom swung around and hit me on the head.
Changing Thoughts on Good Developers by 이동욱 (Translated from Korean) Focusing on individual traits like “characteristics of a good developer” or “personalities suited for developers” turned out to be meaningless. What really mattered was “which developer, with what strengths and weaknesses, works at which company, and in what situation.”
Developers who struggle to go deep into a single technology often thrive in early-stage startups, quickly building a variety of products as the company pivots.
HYBE Bang Si-hyuk Scam Controversy: How Did He Pocket 400 Billion KRW? by Kim Soo-heon
Terraforming Mars Building a Marsbase is a Horrible Idea: Let’s do it! by Kurzgesagt How to Terraform Mars - WITH LASERS by Kurzgesagt NASA researchers discover what happened to Mars’ water by Joshua Shavit
News vleue/vleue_navigator Navigation for Bevy with NavMesh
Avian Physics 0.3 by Joona Aalto My highlights:
Additionally, a new tangent_velocity property is provided to emulate the artificial movement of contact surfaces, making it possible to simulate scenarios such as conveyor belts or speed pads. Physics Picking Filter Physics Diagnostics Development Environment Fixing Rust memory allocation slowdown in VS Code on Windows
Investment When do VCs start seriously thinking about exits? by Demo Day (Translated from Korean) For VCs, exits are not about “greed” but a “structural inevitability.”
As a founder, you must always check the ‘fund maturity date’ of your VC.
Human Resources Things to watch out for when expanding team size by Seunghoon Lee (Translated from Korean) Speed (e.g., product update speed, new technology development/launch speed, etc.