mirror of https://github.com/oxc-project/oxc.git synced 2026-09-14 19:36:11 +08:00

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History

Armano a17de58e30 feat(minifier): process of return/throw in non last position and fix async * inlining (#26214 )

This Pr brings couple optimizations and refactor,

- Disable merging: `if (a) return x; return;` and `if (a) return; return
x;` when is descendant of `async* function`
- Handle empty chains: `if (a) return; return;` → `a; return;`
- Process returns/throw anywhere in block via handler merge `if (a)
return; return; var b` → `a; return; var b`

fixes #26255
ref #24331

2026-09-03 23:05:40 +08:00

docs

docs(minifier): fix stale validation instructions (#26251 )

2026-09-02 15:49:32 +00:00

examples

feat(minifier): add property name mangling (#24740 )

2026-08-17 07:50:51 +00:00

src

feat(minifier): process of return/throw in non last position and fix async * inlining (#26214 )

2026-09-03 23:05:40 +08:00

tests

feat(minifier): process of return/throw in non last position and fix async * inlining (#26214 )

2026-09-03 23:05:40 +08:00

Cargo.toml

release(crates): oxc v0.148.0 (#26198 )

2026-09-01 08:15:07 +00:00

CHANGELOG.md

release(crates): oxc v0.148.0 (#26198 )

2026-09-01 08:15:07 +00:00

README.md

…

README.md

Oxc Minifier

Next-generation JavaScript/TypeScript minifier achieving best-in-class compression.

Inspiration

Closure Compiler: Advanced size optimizations
Terser/UglifyJS: Comprehensive battle-tested transforms
esbuild: Efficient algorithms and architecture
SWC: Modern Rust performance

Key Features

Maximum compression through exhaustive optimizations
100% correctness with comprehensive testing
Fixed-point iteration for optimal size
Arena allocation for performance

Current Performance

See tasks/minsize for compression benchmarks.

Matching/beating esbuild on many libraries
Full test262, Babel, TypeScript conformance

Usage

use oxc_minifier::{Minifier, MinifierOptions};

let options = MinifierOptions::default();
let minifier = Minifier::new(options);
let result = minifier.minify(&mut program);

Testing Infrastructure

just minsize - Track compression benchmarks
cargo coverage - Conformance tests (test262, Babel, TypeScript)
tasks/e2e - Real-world E2E testing

Development

just test - Run all tests
cargo run -p oxc_minifier --example minifier - Try the minifier

Key Dependencies

oxc_ecmascript - ECMAScript operations and constant evaluation
oxc_semantic - Scope and symbol analysis
oxc_mangler - Variable renaming

Documentation

Architecture - Design and components
Optimizations - Complete optimization catalog
Assumptions - Code assumptions for optimization
Correctness - Testing and validation
Roadmap - Development plan
Claude Guide - AI assistant reference