Rspack Bundle Analyzer

Purpose and scope are to deliver a precise analysis of bundle composition for rspack/webpack projects. It identifies which modules contribute most to total size, how chunks are formed, and where duplication or poor code-splitting occurs. The tool consumes bundle metadata (stats.json) and outputs a structured report with byte-level breakdowns and guidance for optimization. It is intended for front-end engineers, build engineers, and performance teams. How it works conceptually: the analyzer streams module and chunk data, aggregates sizes, and maps dependencies to construct a readable topology. The value lies in translating raw size data into actionable targets for reducing load time and improving caching. Unique differentiators include gzip/Brotli estimation, optional grouping by package, and clear signals for code-splitting opportunities. Core features are module-size aggregation, top-module listing, per-chunk breakdowns, and exportable reports. Use cases include pre-release bundle audits, CI-based performance gates, and iterative optimization cycles. Outputs support developers with a concise summary plus a detailed JSON report that can feed dashboards or CI artifacts. The tool helps teams quickly pinpoint scope for refactoring, dynamic imports, and deduplication, delivering measurable improvements in payload size and time-to-interactive.