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Why is the first C++ (m)allocation always 72 KB?

🔥 Explore this insightful post from Hacker News đź“– đź“‚ **Category**: đź’ˇ **What You’ll Learn**: 2026-02-28 TLDR; The C++ standard library sets up exception handling infrastructure early on, allocating memory for an “emergency pool” to be able to allocate memory for exceptions in case malloc ever runs out of memory. I like to spend (some of) my time hacking and experimenting on custom memory allocators with my own malloc implementation(s). While unit tests are useful for correctness, the ultimate test is seeing how the allocator behaves…
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Kuber Mehta’s Portfolio – AI Developer & Full Stack Engineer

Kuber Mehta’s Portfolio – AI Developer & Full Stack Engineer

🚀 Check out this insightful post from Hacker News đź“– đź“‚ **Category**: âś… **What You’ll Learn**: 19-year-old AI developer, Perplexity Business Fellow, winner of Nothing Essential Lab S1 Hackathon (awarded a Nothing Phone 3), featured by The Independent for ClawX, 4th place at Unsloth x AMD RL Hackathon at IIT Delhi, with 20+ hackathons under his belt. From New Delhi, India. Participant in OpenAI Asia-Pacific Developer Discussion. Creator of innovative AI solutions including PolyThink multi-agent AI orchestrator, TREAT trigger detection platform, Backdooms (DOOM running inside a QR code), MEOW (innovative image file format for AI era), and 10+ other projects…
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747s and Coding Agents

747s and Coding Agents

✨ Discover this awesome post from Hacker News đź“– đź“‚ **Category**: đź’ˇ **What You’ll Learn**: 747s and Coding Agents - Home - Blog - Research - Navy - Resume - A couple years ago, I was on the way back from a work trip to Germany. I had been upgraded to business class, and I sat next to a Belgian 747 pilot, probably in his fifties or sixties. We talked a fair bit about our careers. I had left the Navy and started professionally programming less than a year before. He had been a pilot since shortly after graduating university,…
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10-202: Introduction to Modern AI

✨ Read this insightful post from Hacker News đź“– đź“‚ **Category**: 📌 **What You’ll Learn**: 10-202: Introduction to Modern AI Logistics Course Instructor: Zico Kolter Lectures: MW[F] 9:30–10:50 Tepper 1403 (note: Friday lectures will only be used for review sessions or makeup lectures when needed) Online Course A minimal free version of this course will be offered online, simultaneous to the CMU offering, starting on 1/26 (with a two-week delay from the CMU course). This means that all content (lecture videos, assignments available on mugrade, etc) will be available to the online course two weeks after the dates indicated in…
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Stop Burning Your Context Window — We Built Context Mode

🔥 Read this awesome post from Hacker News đź“– đź“‚ **Category**: 📌 **What You’ll Learn**: Every MCP tool call in Claude Code dumps raw data into your 200K context window. A Playwright snapshot costs 56 KB. Twenty GitHub issues cost 59 KB. One access log — 45 KB. After 30 minutes, 40% of your context is gone. Context Mode is an MCP server that sits between Claude Code and these outputs. 315 KB becomes 5.4 KB. 98% reduction. The Problem MCP became the standard way for AI agents to use external tools. But there's a tension at its core: every…
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Block the “Upgrade to Tahoe” alerts and System Settings indicator – The Robservatory

Block the “Upgrade to Tahoe” alerts and System Settings indicator – The Robservatory

đź’Ą Check out this must-read post from Hacker News đź“– đź“‚ **Category**: đź’ˇ **What You’ll Learn**: Based on some comments on my Mastodon post, this only works due to a bug in macOS 15.7.3! The 90 day period isn't supposed to be a rolling date, but 90 days from release date. So it should have no impact…but it does, so I hope Apple doesn't fix the bug.Although I have to have a machine running macOS Tahoe to support our customers, I personally don't like the look of Liquid Glass, nor do I like some of the functional changes Apple has…
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jonwiggins/xmloxide: A pure Rust reimplementation of libxml2

jonwiggins/xmloxide: A pure Rust reimplementation of libxml2

🔥 Explore this must-read post from Hacker News đź“– đź“‚ **Category**: đź’ˇ **What You’ll Learn**: A pure Rust reimplementation of libxml2 — the de facto standard XML/HTML parsing library in the open-source world. libxml2 became officially unmaintained in December 2025 with known security issues. xmloxide aims to be a memory-safe, high-performance replacement that passes the same conformance test suites. Memory-safe — arena-based tree with zero unsafe in the public API Conformant — 100% pass rate on the W3C XML Conformance Test Suite (1727/1727 applicable tests) Error recovery — parse malformed XML and still produce a usable tree, just like libxml2…
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microgpt

microgpt

đź’Ą Check out this must-read post from Hacker News đź“– đź“‚ **Category**: âś… **What You’ll Learn**: This is a brief guide to my new art project microgpt, a single file of 200 lines of pure Python with no dependencies that trains and inferences a GPT. This file contains the full algorithmic content of what is needed: dataset of documents, tokenizer, autograd engine, a GPT-2-like neural network architecture, the Adam optimizer, training loop, and inference loop. Everything else is just efficiency. I cannot simplify this any further. This script is the culmination of multiple projects (micrograd, makemore, nanogpt, etc.) and a…
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Samsung Galaxy update removing some Android recovery tools

Samsung Galaxy update removing some Android recovery tools

🔥 Check out this trending post from Hacker News đź“– đź“‚ **Category**: âś… **What You’ll Learn**: Samsung, with some of its latest updates, is set to remove some core tools from Android’s recovery menu, and it’s unclear why. Every Android smartphone ships with a recovery menu that includes the abilty to reset the device, wipe the cache, apply updates, and more. That’s a very simplified explanation, but it’s a standard feature, and one that you might be most familiar with when manually sideloading Android updates, such as the beta updates Google releases for Pixels. In One UI 8.5, though, Samsung…
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Pentagon chief blocks officers from attending Ivy League schools and other top universities

Pentagon chief blocks officers from attending Ivy League schools and other top universities

đź’Ą Read this awesome post from Hacker News đź“– đź“‚ **Category**: âś… **What You’ll Learn**: Defense Secretary Pete Hegseth is overhauling the list of schools that military officers can attend for professional courses and graduate programs. In a memo on Friday on professional military education institutions, he announced the elimination of certain Senior Service College fellowship programs for the 2026-2027 academic year and beyond. “We must develop strategic thinkers through education grounded in the founding principles and documents of the republic, embracing peace through strength and American ideals, and focused on our national strategies and grounded in realism,” he wrote.…
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