1. SWC for JSX/TSX

• Syntax transformation
  • Compiles .jsx and .tsx into standard JavaScript.
• Fast Refresh support
  • Recompiles only changed components at high speed for near-instant hot reloading.

2. Turbo Engine (Rust)

• Incremental compilation
  • Remembers function-level results in memory; only re-runs what changed.
• Built in Rust
  • Leverages low-overhead, high-performance systems code.

3. Unified Module Graph

• Single dependency graph
  • Solves both client and server bundling in one pass.
• ESM / TS / JSX support
  • Shares analysis across runtimes to avoid duplicate work.

4. Lazy Bundling (Dev Mode)

• On-demand packaging
  • Bundles only modules actually requested by the browser.
• Faster startup
  • No full-project scan before first render.

5. Parallel & Incremental Computation

• Multi-core utilization
  • Splits tasks across CPU cores.
• Aggressive caching
  • Identical inputs are skipped on subsequent builds.

6. Lightning CSS (Rust)

• Ultra-fast CSS processing
  • Handles plain CSS, CSS Modules, nesting, etc.
• Rust-native implementation
  • Outperforms JS-based processors by an order of magnitude.

7. PostCSS Plugin Support

• Node.js worker threads
  • Runs postcss.config.js (e.g. Tailwind, Autoprefixer) alongside Rust tools.