https://slash-tmp.blog/notes Benchmark-backed engineering notes, systems experiments, project case studies, and AI-assisted tooling from the scratch directory. en Mon, 07 Sep 2026 00:00:00 GMT https://slash-tmp.blog/notes/learning-from-hardened-chromium-architecture https://slash-tmp.blog/notes/learning-from-hardened-chromium-architecture A process-by-process map of Chromium, the hardened fork's hook points, and how website-visible decisions cross Blink, Content, Chrome, services, and local automation. Project Lessons Mon, 07 Sep 2026 00:00:00 GMT 2026-09-07T00:00:00.000Z https://slash-tmp.blog/notes/learning-from-hardened-chromium-automation-policy-broker https://slash-tmp.blog/notes/learning-from-hardened-chromium-automation-policy-broker How Website View policy, WebDriver signaling, launch-time switches, and an authenticated broker connect local applications to one visible Chromium instance. Project Lessons Mon, 07 Sep 2026 00:00:00 GMT 2026-09-07T00:00:00.000Z https://slash-tmp.blog/notes/learning-from-hardened-chromium-user-input-media-privacy https://slash-tmp.blog/notes/learning-from-hardened-chromium-user-input-media-privacy How the fork protects selection, context menus, keyboard defaults, clipboard, drag data, camera, microphone, location, and display capture. Project Lessons Mon, 07 Sep 2026 00:00:00 GMT 2026-09-07T00:00:00.000Z https://slash-tmp.blog/notes/learning-from-hardened-chromium-website-visible-state https://slash-tmp.blog/notes/learning-from-hardened-chromium-website-visible-state How Hardened Chromium substitutes visibility, focus, lifecycle, idle, screen, fullscreen, API, and cursor signals—and which secondary signals remain. Project Lessons Mon, 07 Sep 2026 00:00:00 GMT 2026-09-07T00:00:00.000Z https://slash-tmp.blog/notes/learning-from-projects-neural-network-tutor https://slash-tmp.blog/notes/learning-from-projects-neural-network-tutor A story-driven visual course that lets every neural-network idea earn its place by solving a visible problem, from one weighted vote through hidden representations, transformers, modern learning phenomena, and production debugging. Project Lessons Thu, 16 Jul 2026 00:00:00 GMT 2026-09-06T00:00:00.000Z https://slash-tmp.blog/notes/learning-from-thunderbird-end-to-end-pipeline https://slash-tmp.blog/notes/learning-from-thunderbird-end-to-end-pipeline An implementation-level walkthrough of how ThunderbirdAI queues mail, builds canonical local records, indexes evidence, enforces scope, and uses an optional endpoint without treating the model as the mailbox. Project Lessons Sun, 06 Sep 2026 00:00:00 GMT 2026-09-06T00:00:00.000Z https://slash-tmp.blog/notes/learning-from-thunderbird-email-classification https://slash-tmp.blog/notes/learning-from-thunderbird-email-classification A from-zero visual tutorial building email classification from rules and Naive Bayes through personalization, specialist-model cascades, confidence, local model evaluation, and safe promotion. Project Lessons Thu, 03 Sep 2026 00:00:00 GMT 2026-09-03T00:00:00.000Z https://slash-tmp.blog/notes/learning-from-thunderbird-email-model-input https://slash-tmp.blog/notes/learning-from-thunderbird-email-model-input A beginner-first tutorial following email from MIME bytes through canonical text, language detection, translation, Unicode offsets, PII detection, redaction, and safe model input. Project Lessons Thu, 03 Sep 2026 00:00:00 GMT 2026-09-03T00:00:00.000Z https://slash-tmp.blog/notes/learning-from-thunderbird-template-mining https://slash-tmp.blog/notes/learning-from-thunderbird-template-mining A from-scratch tutorial following repeated email through template mining, source-linked extraction, symbolic facts, proof trees, and hierarchical summarization. Project Lessons Thu, 03 Sep 2026 00:00:00 GMT 2026-09-03T00:00:00.000Z https://slash-tmp.blog/notes/learning-from-projects-clusterlens-algorithms https://slash-tmp.blog/notes/learning-from-projects-clusterlens-algorithms A beginner-first, experimental tutorial for PCA, KMeans, MiniBatchKMeans, FAISS, HDBSCAN, similarity graphs, outliers, reranking, and cluster quality. Project Lessons Thu, 16 Jul 2026 00:00:00 GMT 2026-09-02T00:00:00.000Z https://slash-tmp.blog/notes/learning-from-projects-face-clustering https://slash-tmp.blog/notes/learning-from-projects-face-clustering A from-scratch visual tutorial on face detection, landmarks, alignment, embeddings, thresholds, clustering, prototypes, and human review, backed by an actual ClusterLens run. Project Lessons Wed, 02 Sep 2026 00:00:00 GMT 2026-09-02T00:00:00.000Z https://slash-tmp.blog/notes/learning-from-projects-perceptual-hashing-duplicates https://slash-tmp.blog/notes/learning-from-projects-perceptual-hashing-duplicates A from-scratch visual tutorial on exact hashes, dHash, pHash, wHash, thresholds, indexing, embedding reranking, ORB, and safe duplicate review. Project Lessons Thu, 16 Jul 2026 00:00:00 GMT 2026-09-02T00:00:00.000Z https://slash-tmp.blog/notes/learning-from-projects-semantic-image-search https://slash-tmp.blog/notes/learning-from-projects-semantic-image-search A beginner-first tutorial on representations, pixels, features, embeddings, image and text encoders, shared vector spaces, and measured CLIP, SigLIP, and DINO experiments. Project Lessons Tue, 01 Sep 2026 00:00:00 GMT 2026-09-02T00:00:00.000Z https://slash-tmp.blog/notes/learning-from-thunderbird-rag https://slash-tmp.blog/notes/learning-from-thunderbird-rag A from-scratch visual tutorial following one email through tokenization, embeddings, exact and hybrid retrieval, evidence packing, grounded generation, GraphRAG, security, and evaluation. Project Lessons Wed, 02 Sep 2026 00:00:00 GMT 2026-09-02T00:00:00.000Z https://slash-tmp.blog/notes/booting-my-confusions-and-chatgpt https://slash-tmp.blog/notes/booting-my-confusions-and-chatgpt A capability-by-capability note on early boot: reset vectors, firmware, microcode, XIP, cache-as-RAM, DRAM bring-up, C runtime setup, memory types, and first page tables. Computer Internals Fri, 12 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/cache-search-lab https://slash-tmp.blog/notes/cache-search-lab A single-system benchmark study of arrays, pointer chasing, binary search layouts, hash maps, prefetching, memory-level parallelism, and false sharing. Performance Notes Sun, 31 May 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/cache-simd-dsa https://slash-tmp.blog/notes/cache-simd-dsa A standalone benchmark note for 10 DSA problems, with naive, cache-aware, SIMD, and cache-aware SIMD C++ variants measured from 4 KiB to 64 MiB. Performance Experiments Tue, 09 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/clamav-simd-fast-paths https://slash-tmp.blog/notes/clamav-simd-fast-paths A microbenchmark-backed note on accelerating ClamAV-style parsing work with SIMD string search, whitespace skipping, hash comparison, hardware CRC32, and base64 decoding. Performance Notes Sat, 13 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/clean-code-tax-measured https://slash-tmp.blog/notes/clean-code-tax-measured A benchmark-backed note on when clean-code idioms are free, when compilers erase them, and when abstraction becomes hot-path cost. Performance Notes Sun, 14 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/dsa-state-space-exploration-superset-professional-playbook https://slash-tmp.blog/notes/dsa-state-space-exploration-superset-professional-playbook An integrated DSA guide connecting state exploration, divide/recombine, and string-state reasoning into one decision model. DSA Notes Tue, 02 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/inih-simpler-scans-flat-storage https://slash-tmp.blog/notes/inih-simpler-scans-flat-storage A benchmark-backed note on speeding up inih with bulk string reads, explicit ASCII scan classification, selective AVX2, and flat C++ reader storage. Performance Notes Wed, 15 Jul 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/interview-c-deep-answers https://slash-tmp.blog/notes/interview-c-deep-answers Deep-answer interview notes for C questions: memory, allocation, linkage, arrays, alignment, and synchronization. Interview Notes Mon, 15 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/interview-cpp-deep-answers https://slash-tmp.blog/notes/interview-cpp-deep-answers Deep-answer interview notes for C++ questions: RAII, object lifetime, templates, casting, ownership, and memory order. Interview Notes Mon, 15 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/interview-system-design-deep-answers https://slash-tmp.blog/notes/interview-system-design-deep-answers Deep-answer interview notes for system design questions: APIs, caches, Kafka, consistency, disaster recovery, and Spanner. Interview Notes Mon, 15 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/learning-from-projects-clusterlens-ui-runtime https://slash-tmp.blog/notes/learning-from-projects-clusterlens-ui-runtime A desktop runtime note on making local ML image tools responsive with PyQt virtualization, lazy thumbnails, worker jobs, generated storage, and safe file actions. Project Lessons Thu, 16 Jul 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/learning-from-projects-desktop-local-apps https://slash-tmp.blog/notes/learning-from-projects-desktop-local-apps A desktop product note on workers, virtualized PyQt tables, import auditability, parser health, schedulers, dashboards, tray tools, and generated data. Project Lessons Thu, 16 Jul 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/linux-io-path-vfs-block-nvme https://slash-tmp.blog/notes/linux-io-path-vfs-block-nvme A structure-by-structure map of Linux buffered I/O, direct I/O, VFS, page cache, iomap, bio, blk-mq, NVMe commands, DMA mappings, completions, and the PMEM/DAX contrast. Computer Internals Sat, 13 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/memory-path-animation https://slash-tmp.blog/notes/memory-path-animation An interactive map of what can happen after a user instruction touches memory: translation, TLBs, caches, page walks, DRAM, MMIO, PCIe, IOMMU, and DMA. Computer Internals Thu, 11 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/miniz-checksum-codec-optimization https://slash-tmp.blog/notes/miniz-checksum-codec-optimization A benchmark-backed note on CRC-32, Adler-32, SIMD, prefetching, memcpy, and why codec-level compression gains are harder than checksum wins. Performance Notes Mon, 15 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/mutex-internals-hardware-futex https://slash-tmp.blog/notes/mutex-internals-hardware-futex A hardware-to-runtime map of atomics, cache coherence, memory ordering, spinlocks, futex-backed mutexes, kernel mutex paths, and condition variables. Computer Internals Sat, 13 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/orb-python-to-rust https://slash-tmp.blog/notes/orb-python-to-rust A benchmark-backed record of Python-to-Rust ORB backtester speedups, accepted stage ports, rejected experiments, and claim boundaries. Performance Notes Thu, 04 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/packet-flow-nic-dma-kernel-xdp-dpdk https://slash-tmp.blog/notes/packet-flow-nic-dma-kernel-xdp-dpdk A hardware-to-userspace walkthrough of how packets move through NIC DMA rings, Linux drivers, NAPI, sk_buff, TCP, XDP, AF_XDP, and DPDK. Computer Internals Sat, 13 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/pdftotext-fast-paths https://slash-tmp.blog/notes/pdftotext-fast-paths A benchmark-backed note on making PDF text extraction faster with cheaper utility output, lighter ordered text ingestion, image-skip logic, page threading, and an unordered direct-text mode. Performance Notes Sat, 13 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/simd-mapping https://slash-tmp.blog/notes/simd-mapping A practical tutorial and cheatsheet for translating scalar loops, branches, reductions, and byte scans into AVX2 SIMD patterns. Computer Internals Thu, 11 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/system-design-three-constraints https://slash-tmp.blog/notes/system-design-three-constraints A visual system design reference: technologies reduce to Physics, Money, or Truth through concrete causal ladders. System Design Notes Sat, 13 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/what-clearing-bss-means https://slash-tmp.blog/notes/what-clearing-bss-means A practical mental model for .bss: how compilers, linkers, ELF loaders, and early kernel boot cooperate to make zero-initialized globals real. Computer Internals Sat, 13 Jun 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/zlob-in-memory-glob-matching https://slash-tmp.blog/notes/zlob-in-memory-glob-matching A benchmark-backed note on widening zlob's suffix fast path, pruning recursive work earlier, reusing outputs, adding count-only APIs, and threading only when the scan is big enough. Performance Notes Wed, 15 Jul 2026 00:00:00 GMT 2026-08-26T00:00:00.000Z https://slash-tmp.blog/notes/vibe-coded-method https://slash-tmp.blog/notes/vibe-coded-method How I use AI as an execution amplifier while keeping premises, constraints, validation, and conclusions human-owned. AI Notes Sun, 05 Jul 2026 00:00:00 GMT 2026-07-05T00:00:00.000Z https://slash-tmp.blog/notes/ai-wrote-everything-except-this https://slash-tmp.blog/notes/ai-wrote-everything-except-this A mostly raw field note on using Codex to revive half-finished projects, write blog drafts, optimize code, fight GUI layouts, and avoid doing every chore by hand. AI Notes Tue, 09 Jun 2026 00:00:00 GMT 2026-06-09T00:00:00.000Z