I built a Chrome extension that stream-parses 2GB XML files using only 20MB of RAM. Here's the architecture.

A developer built a Chrome extension that can parse XML files up to 2GB using only ~20MB of RAM by avoiding DOM tree construction. It uses File.slice() for chunked reading, a custom SAX parser (~200 lines) for incremental processing in a Web Worker, and TextDecoder with stream mode to handle UTF-8 boundary issues. The extension supports real-time search, element exploration, and stats computation in a single pass, all in 45KB with zero dependencies.