Notes on fullstack & AI engineering — with interactive demos and code.https://bitlabs.pages.dev/https://bitlabs.pages.dev/posts/token-bill/https://bitlabs.pages.dev/posts/token-bill/Token pricing looks simple until you're running a million calls a month. Here's a practical way to count the real cost — and a small harness for trading cost against quality.Tue, 06 Oct 2026 00:00:00 GMThttps://bitlabs.pages.dev/posts/spark-dataframe-execution/https://bitlabs.pages.dev/posts/spark-dataframe-execution/Your code runs top to bottom. Spark doesn't. A small-dataset walkthrough of lazy execution order, shuffles, caching, persist, checkpointing — and the best practices that fall out of them.Tue, 06 Oct 2026 00:00:00 GMThttps://bitlabs.pages.dev/posts/java-27-features/https://bitlabs.pages.dev/posts/java-27-features/JDK 27 shipped September 15, 2026 with 9 JEPs. Four are final — and two of them change how every JVM you run behaves without touching a line of code.Tue, 06 Oct 2026 00:00:00 GMThttps://bitlabs.pages.dev/posts/genai-vs-llama/https://bitlabs.pages.dev/posts/genai-vs-llama/Gen AI is the field; Llama is one open-weight model family inside it. The differences, the use cases, the transformer architecture under the hood — with an interactive token sampler you can play with.Tue, 06 Oct 2026 00:00:00 GMT