SWC is a Rust-based compiler for TypeScript and JavaScript designed to accelerate web development. The project's name stands for Speedy Web Compiler, and it functions as a dual-purpose library accessible to both Rust developers and JavaScript users. For Rust users, the primary entry point is the parser module documented in rustdoc, while JavaScript users access SWC through npm packages like @swc/core and can reference the project's website documentation for integration guidance.
The repository is classified across multiple domains including Web Compiler, JavaScript, TypeScript, Bundler, Minifier, Transformer, and Toolchain categories. It covers the full spectrum of ECMAScript and TypeScript compilation needs, with a strong emphasis on performance optimization. The project maintains compatibility with Node v10 and above for usage, though development requires Node v20 or later. For Rust users, the minimum supported Rust version is 1.73.
SWC's development activity shows significant engagement from the open-source community. According to GitGenius tracking data across 1536 issues and pull requests, the median response latency is 0.0 hours, indicating rapid triage and response times. The mean response latency of 1427.1 hours reflects the distribution of older items in the backlog. The most frequently applied issue label is C-bug with 1000 occurrences, followed by enhancement requests with 195 items and invalid link reports with 61 items. The project's primary maintainer, kdy1, has logged 3821 tracked events, with significant contributions from magic-akari at 257 events and kwonoj at 119 events.
The repository maintains strong connections to major technology projects through overlapping contributors. GitGenius identifies shared contributors with microsoft/vscode, microsoft/typescript, and denoland/deno, indicating deep integration within the broader TypeScript and JavaScript ecosystem. This cross-project involvement suggests SWC's role as a foundational tool for these major platforms.
The project distributes through multiple channels including npm packages tracked by download metrics and Rust crates available on crates.io, particularly swc_ecma_parser. SWC emphasizes reliability for Rust users through a guarantee that selecting the latest version of each crate will result in a working configuration. The project provides comparison documentation with Babel to help users understand feature parity and migration paths, along with benchmark results demonstrating performance characteristics.
SWC is maintained as a community-driven project by volunteers and accepts contributions through GitHub. The project is distributed under the Apache License Version 2.0 and provides architecture documentation to guide potential contributors. Development support is coordinated through Discord and GitHub Discussions, with the project also accepting financial sponsorship through Open Collective to sustain ongoing development efforts.
