hackernews

1. Nvidia DGX Spark: When Benchmark Numbers Meet Production Reality Total comment counts : 7 Summary error Overall Comments Summary Main point: The discussion centers on using NVIDIA DGX Spark with llama.cpp/transformers, highlighting impressive performance and ease of use for some while exposing significant stability and memory-related issues. Concern: The primary worry is instability and driver/memory fragmentation problems that can degrade training and inference, potentially limiting real-time serving viability. Perspectives: Viewpoints range from enthusiastic users praising ease of use and strong model performance to critics warning of bleeding-edge instability, memory fragmentation, and conflicting benchmark claims....

1. The Journey Before main() Total comment counts : 3 Summary Linux starts programs via execve, passing the executable path, argv, and envp. Higher-level wrappers resolve paths; shebang lines invoke interpreters. Executables are ELF files (ELF32 for RV32). ELF contains sections like .text, .data, .bss, .plt, symbol tables, and dynamic sections for shared libraries. The kernel loads the loadable sections, applies security measures (ASLR, NX), loads libc (musl or glibc), relocates pointers, and performs dynamic linking....

1. The Swift SDK for Android Total comment counts : 8 Summary Swift’s Android workgroup released nightly previews of the Swift SDK for Android, enabling native Swift Android development and cross-platform interoperability with Java via the swift-java project. The SDK is available on Windows, Linux, and macOS, with Getting Started guides and end-to-end Android examples. Developers can port Swift packages (over 25% of Swift Package Index now Android-ready) and use bindings generators....

1. Claude Memory Total comment counts : 40 Summary Claude is expanding memory to Pro and Max plans as of Oct 23, 2025. The feature adds project-scoped memory, letting Claude remember team contexts—projects, processes, client needs, specs—and provides a memory summary you can view/edit. Memory can be restricted or disabled by admins (Team/Enterprise), and incognito chats let you have conversations that aren’t saved or recalled. Memory is optional with granular controls and safety-tested to avoid harmful patterns....

1. Build Your Own Database Total comment counts : 14 Summary An instructional guide to building a key-value database from scratch. It starts with a naive file-based store (db.txt) where updates/deletes rewrite the file, which is inefficient. To fix this, it proposes immutable, append-only logs: add new records, keep the last key occurrence, and use tombstones to mark deletes. To prevent unbounded growth, it introduces periodic compaction, splitting into segments, and merging....

1. Claude Code on the Web Total comment counts : 28 Summary Claude Code on the web lets you delegate coding tasks from your browser in a beta research preview. You can connect GitHub repos, describe tasks, and Claude executes them in isolated cloud sandboxes, enabling parallel sessions, real-time progress tracking, and steering as it runs. It supports automatic PR creation and change summaries, and a single interface can manage tasks across multiple repos....

1. Doing well in your courses: Andrej’s advice for success (2013) Total comment counts : 28 Summary Andrej Karpathy’s study advice: skip all-nighters; sleep ~7.5 hours (min ~4). Start studying days ahead; brains consolidate at night. Attend tutorials to stimulate thinking; if boring, switch sessions. Make a study plan, list all topics, estimate time, review past tests to learn professor’s style. Focus on being able to write/derive key concepts, not just read....

1. Root System Drawings Total comment counts : 15 Summary error Overall Comments Summary Main point: The discussion centers on a collection of plant root diagrams, their production and interpretation, and the idea of roots as a metaphor for hidden knowledge behind visible systems. Concern: The main worry is that the diagrams and their metaphors may be misinterpreted or overly generalized beyond what the images actually depict. Perspectives: Views range from awe and fascination with the visuals and their creation, to scientific and artistic interpretation, to caution about context and potential misinterpretation....

1. Exploring PostgreSQL 18’s new UUIDv7 support Total comment counts : 4 Summary UUIDv7, introduced in Postgres 18, improves on UUIDv4 by placing a 48-bit timestamp as the most significant portion, enabling natural sortability and efficient sequential inserts. This reduces index fragmentation, improves cache locality, and simplifies time-based queries, with broad language support (e.g., Python 3.14). UUIDs are consistent across platforms via uuid_extract_version. Caution: the embedded timestamp leaks creation time, so use UUIDv7 for internal keys only and keep an external random UUIDv4 as public identifiers....

1. Claude Skills Total comment counts : 65 Summary Claude Skills are modular folders with instructions, scripts, and resources that Claude loads only when relevant, boosting performance on tasks like Excel, PowerPoint, Word, and PDFs. They work across Claude apps, Claude Code, and the API, loading minimal data to stay fast. Available to Pro, Max, Team, and Enterprise users, skills can be created with a “skill-creator” tool. Admins can enable org-wide for teams....