Turbopack: Building faster by building less

2 months ago

Turbopack is designed for fast iteration loops using caching and incremental computation.
It is the default bundler for Next.js, aimed at enabling instant builds and fast React Fast Refresh.
Turbopack's architecture is built with caching in mind, drawing from research and tools like Salsa, Parcel, and Rust compiler's query system.
It uses fine-grained caching with 'value cells' to track dependencies and minimize recomputation.
Turbopack's approach avoids manual dependency graphs, reducing errors and improving efficiency.
The system marks dirty cells and propagates changes efficiently, only recomputing when necessary.
Aggregation graphs help in efficiently querying large portions of the dependency graph.
File system caching was introduced in Next.js 16.1, persisting caches to disk for faster restarts.
The development of file system caching took over a year to meet performance and quality standards.

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