Building a Custom Zig-Based DOM Implementation to Replace LibDOM

Summary

A technical team replaced the LibDOM library with their own Zig-based DOM implementation called zigdom to address friction between V8, their Zig layer, and LibDOM, particularly around events, Custom Elements, and ShadowDOM. After six months of prototyping, they created a leaner, more cohesive DOM that provides full control over memory, events, and future enhancements. They also integrated html5ever for parsing and added V8 snapshots to reduce startup time. While performance gains were modest (single-digit percentages), the main benefit was achieving a unified codebase that's easier to extend and maintain.