How Turbopack chunks your JavaScript: deep dive into chunking tradeoffs
aidenybai · x · 2026-09-11
Turbopack 贡献者 Sam Poder 发表长文,系统讲解 Turbopack 如何决定哪些代码进入哪个 chunk,并介绍其在 Next.js 16.3 中 shipped 的实验性分块特性。
- 从最简单方案讲起:所有 355 个模块打进一个 1.09MB 的 chunk——缓存友好(每页共享、后续加载全命中缓存),但站点变大后每页都要背上全部 JS。
- 逐页一个 chunk 则相反:不会多ship代码,但公共依赖重复加载,导航变慢。
- 文章逐步展示中间方案与 Turbopack 实际生成的 chunk 结构(含 runtime、依赖打包与 debugId),解释其分块策略背后的取舍。
aiden bai 转发推荐为「excellent read」,是前端构建工具领域少见的原理级复盘。
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