Elsewhere
Release TIL Research Tool Museum
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Research
H3 Library Performance Benchmark
— A systematic performance benchmark was conducted on two prominent Python libraries implementing Uber's H3 geospatial indexing system: h3-py (official, C-based) and h3o-python (Rust-based). Results show h3o-python consistently outperforms h3-py on core operations, achieving over 2x speedup for coordinate conversions and up to 13x faster neighbor queries, while area calculations remain comparable.
Research
Browser-Based Single File Bundler
— Investigating the feasibility of Vite as a browser-based bundler, this project demonstrates that while Vite itself cannot operate directly in the browser due to its Node.js dependencies, client-side file bundling is achievable using alternative strategies. Three approaches were prototyped: a pure JavaScript "simple" bundler for inlining assets, an esbuild-wasm browser integration for ES module support, and full Vite bundling via StackBlitz WebContainers using vite-plugin-singlefile.
Research
Blog Tag Prediction with Scikit-Learn
— Automatically assigning meaningful tags to historic, untagged blog posts, this project leverages the Simon Willison blog database and scikit-learn to train and compare multi-label text classification models. Four approaches—TF-IDF + Logistic Regression, Multinomial Naive Bayes, Random Forest, and LinearSVC—were tested on posts’ title and body text using the 158 most frequently used tags.
Research
Datasette Plugin Writer Skill
— Covering every aspect of Datasette plugin development, this project creates a comprehensive skill set for authors—from bootstrapping with cookiecutter to deploying on GitHub and PyPI. It provides precise guides and working code samples for essential plugin hooks like custom SQL functions, authentication, custom views, and output formats.
Research
SQLite-utils Iterator Support Research
— Enhancements to the sqlite-utils library now allow its `insert_all` and `upsert_all` methods to efficiently process Python iterators yielding lists, in addition to the original dict-based input. Detection of the iterator type is automatic and maintains full backward compatibility, streamlining bulk inserts from row-based data sources like CSV streams and reducing memory usage by avoiding dict construction.
Research
SVG to PNG Renderer
— A lightweight SVG to PNG renderer has been developed using Python, leveraging the `xml.etree.ElementTree` and `Pillow` libraries to parse SVG XML data and convert it to raster PNG images. This minimal library supports a range of SVG elements, including paths, basic shapes, and containers, as well as attributes such as colors, styling, and transforms.
Research
env86 Analysis Report
— env86 is a Go-based management tool that enables users to run x86 Linux virtual machines within browser contexts via the v86 WebAssembly emulator. By combining a native desktop application (embedding a browser), a robust CLI, and an integrated virtual networking stack, env86 provides an easily distributable and reproducible Linux environment that can boot instantly from snapshots, support host-guest communication, and mount host filesystems.
Research
SQLite Hierarchical Permission System — Proof of Concept
— A proof-of-concept implements a fully SQLite-based hierarchical permission system that computes allowed database/table pairs by cascading rules across child (table), parent (database), and global levels with DENY-over-ALLOW semantics; it uses only plain SQL (CTEs + SQLite JSON functions) and is built on SQLite (https://sqlite.org).
Research
Datasette-lite JavaScript Initialization: Problem Analysis & Solution Proposal
— Datasette-lite faces a core limitation: HTML content injected via `innerHTML` does not execute embedded JavaScript, breaking interactive features and plugin functionality. The proposed solution introduces a standardized initialization event (`datasette_init`) triggered after each content update, allowing dependent scripts and plugins to reinitialize reliably.
Research
SQLite Query Linter
— The SQLite Query Linter is a lightweight Python library that wraps the standard `sqlite3` module to provide configurable linting and rule-based analysis of SQL queries before execution. Acting as a drop-in replacement, it helps catch common syntax errors and platform incompatibilities—such as invalid types in `CAST`, use of unsupported functions, `SELECT *`, missing `WHERE` clauses, and string quoting mistakes—helping developers avoid runtime errors and improve code quality.
Research
UV Run Flow Analysis: Deep Dive into `uv run myscript.py`
— Running `uv run myscript.py` in a directory with a `pyproject.toml` launches a multi-phase workflow that automates Python script execution within an isolated, dependency-managed environment. uv scans for project metadata, resolves and validates interpreter and package requirements, manages virtual environments, locks dependencies with a TOML-based `uv.lock` file using the PubGrub algorithm, efficiently syncs the environment with parallel downloads and caching, and finally executes the desired…
Research
Self-Hosting Datasette Lite: Research Report
— Datasette Lite, a browser-based SQLite explorer powered by Pyodide and WebAssembly, can be fully self-hosted and used offline by bundling all core files, required Python wheels, and optional sample databases locally instead of relying on external CDNs and PyPI hosts.
Research
mquickjs Sandbox Investigation
— Exploring mquickjs, a highly minimal JavaScript engine, this project rigorously evaluates its suitability as a safe sandbox for running untrusted code. Various integration approaches are implemented, including Python FFI, C extensions, subprocess invocation, and WebAssembly runtimes—each tested for startup and execution performance, security isolation, and feature compatibility.
Tool
MicroQuickJS Code Executor
— Execute JavaScript code in a lightweight MicroQuickJS sandbox environment running via WebAssembly, with results displayed directly on the page. The sandbox supports ES5-like JavaScript features and automatically saves your code in the URL for easy sharing and recovery. Choose between optimized and original WebAssembly versions, try built-in examples, and use Ctrl+Enter to quickly run your code.
Tool
Photo print layout
— Create custom photo print layouts for A4 pages with adjustable grid configurations, image fitting options, and portrait or landscape orientations. Users can add photos by uploading files or dragging and dropping them directly onto the page, then remove individual photos or clear the entire layout before printing. The preview displays actual print dimensions, allowing precise control over how photos will appear on the final printed output.
Tool
JSON Diff Tool
— Compare JSON documents side-by-side to identify additions, removals, and modifications between two versions. The tool displays differences with color-coded highlighting and provides character-level detail for string changes, making it easy to spot exactly what has changed. Preloaded examples are available to explore common use cases like configuration updates, user profile changes, and API response comparisons.
Tool
Claude Code Timeline Viewer
— View Claude Code session `.jsonl` files as an interactive timeline with customizable filtering and search capabilities. This tool displays events chronologically, extracting conversation messages, tool calls, and file snapshots with formatted previews of text content, code blocks, and embedded images. Use the file picker, drag-and-drop, paste input, or URL fetch to load your session data and explore it with timezone switching, content-type filters, and easy JSON export.
Tool
Codex Timeline Viewer
— View Mozilla Codex rollout timeline events from `.jsonl` files with an interactive interface that supports filtering, searching, and detailed event inspection. Load files via drag-and-drop, paste, or URL fetch, then explore events organized chronologically with customizable timezone display and comprehensive event details including formatted content, tool calls, and reasoning blocks.
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