文章摘要
Ladybird项目决定采用Rust语言替代C++,因其内存安全特性及成熟的生态系统。尽管Rust与C++面向对象风格不兼容,但考虑到Firefox等已采用Rust,团队决定从LibJS引擎开始逐步重写。AI工具协助了部分迁移工作。
文章总结
标题:Ladybird项目在AI助力下采用Rust语言
核心内容: 1. 项目背景 - Ladybird团队长期寻找替代C++的内存安全编程语言 - 曾尝试Swift但存在跨平台限制和C++交互问题 - 最终选择Rust,因其成熟的系统编程生态和团队熟悉度
- 选择Rust的原因
- 2024年评估时因OOP支持不足暂缓采用
- 权衡后认为Rust的安全特性和生态优势更重要
- 主流浏览器(Firefox/Chromium)已开始采用Rust
- 迁移实施
- 首个迁移目标:JavaScript引擎LibJS
- 使用Claude Code和Codex进行辅助翻译(非自动生成)
- 保持与C++版本字节级一致的严格标准
- 完成2.5万行Rust代码迁移,耗时约两周
- 验证结果
- 通过test262等测试套件(共65,359项测试)零回归
- 性能测试无退化
- 采用双管道并行运行验证机制
- 后续计划
- 保持C++/Rust代码共存状态
- 由核心团队统筹迁移优先级
- 逐步优化非地道的Rust代码
项目创始人Andreas Kling表示,虽然这个决定可能存在争议,但相信这是Ladybird未来的正确选择。
(注:删减了具体代码审查过程、寄存器分配等过细技术细节,保留了关键决策因素和迁移成果的核心数据)
评论总结
以下是评论内容的总结:
1. 对语言选择的质疑
Swift的局限性:有评论指出Swift在跨平台支持和C++互操作性上的不足,选择Swift一开始就存在问题。
- "Why was there ever any expectation for Swift having good platform support outside Apple?" (评论21)
- "the decision to use Swift always seemed pretty 'out there'" (评论22)
Rust的适用性:部分评论对Rust是否适合该项目表示怀疑,认为其严格的借用检查可能影响开发效率。
- "Rust is notoriously bad at letting people define their own structure... it's not a fit for when you need to deliver a really huge codebase" (评论23)
- "I don't know if it's a good fit... Ladybird praises CPP/Swift currently" (评论12)
2. AI辅助编程的讨论
积极评价:AI在代码迁移中表现出色,大幅提升效率且保持零回归。
- "The entire port took about two weeks. The same work would have taken me multiple months to do by hand" (评论8)
- "A big win... How long until Ladybird begins to impact market dominance?" (评论28)
消极反应:AI引发对编程热情减退和职业前景的担忧。
- "Agents keep killing all the passion I have for programming... Soon it will do everything better" (评论7)
- "10x programmers become 100x with the power of AI... the world is going to suck for ordinary people" (评论20)
3. 项目方向的争议
支持转型:部分用户认为转向Rust是合理选择,可能促进与Servo的合作。
- "Cool, that seems like a rational choice... will make both of them more likely to succeed" (评论24)
- "Very happy to see this... Rust makes a whole lot more sense" (评论22)
质疑决策:批评项目频繁更换语言显得不够专业。
- "This entire project starts to look like 'how am I feeling today?' rather than a serious project" (评论10)
- "This feels like yah shaving instead of focusing on delivering a browser" (评论16)
4. 技术细节的探讨
迁移质量:关注非惯用Rust代码可能带来的技术债务。
- "Is 'cleanup' doing a lot of heavy lifting here? Could that mean another complete rewrite?" (评论5)
- "I wonder what kind of tech debt this brings" (评论27)
替代方案:建议考虑其他内存安全语言如D或Ada。
- "Is there any discussion on why D or even Ada was not considered?" (评论18)
5. 情感反应
乐观期待:对独立浏览器引擎的出现表示欢迎。
- "If this means we will get an independent state-of-the-art browser engine, I'm all for it" (评论13)
失望情绪:对项目方向改变感到不安。
- "I am left with disappointment and unease... Comparable to when a series jumps the shark" (评论9)
(注:所有评论均未显示评分,故未包含认可度分析)