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KC3 v0.1.17 released with incremental compilation for 5x faster loading, binary database logging, a new HTTPS client, and various bug fixes.
Explains the mutual exclusivity issue between sccache and incremental compilation: enabling both leads to 20GB incremental cache consumption and dependencies being recompiled each time. After disabling incremental, large third-party libraries compile once and are reused across projects, achieving a cache hit rate of 53–93% after the first compilation.
A Zig core team member explains the internals and usage of Zig's incremental compilation, which allows rebuilds in milliseconds by recompiling only changed code and patching it into the binary.
Typst uses constrained memoization (comemo) and pure function design to make the language and compiler work together, achieving efficient incremental compilation and real-time preview. The article details the design ideas of layout caching, module evaluation memoization, function purity, and the introspection system.
A Rust developer profiles and optimizes the incremental rebuild time of SQLx tests, identifying bottlenecks like debuginfo generation and proc macro overhead, and proposes improvements to speed up test compilation.
The new Zig ELF linker now supports fast incremental compilation with external libraries and C sources, enabling rebuilds in milliseconds on x86_64 Linux.
A technical blog post critiques query-based compilers, arguing that their effectiveness is limited by the dependency structure of the source language, particularly the avalanche effect where changes can propagate widely, making incremental updates often as expensive as a full rebuild.