The Zig programming language has undergone a significant build system rework that dramatically improves performance. The changes separate the maker process from the configurer process, allowing build.zig files to compile into a smaller process. This approach enables caching of serialized configuration files and optimized execution of build graphs. Benchmark results show a 90% reduction in wall time for build commands, making zig build substantially faster for developers.

Zig now supports incremental compilation with the LLVM backend, reducing compile times for error reporting. When code contains compile errors, developers receive feedback much faster since the compiler doesn't need to complete the "LLVM Emit Object" step. The feature is available in the master branch and can be enabled with -fincremental --watch. The core team has benefited from this feature for over a year, reporting significant improvements in workflow efficiency.

A 30,000 line PR has reworked the Zig compiler's type resolution logic, making it more logical and straightforward. The compiler now lazily analyzes type fields, improving performance when types are used as namespaces without initialization. This change fixes cases where previously valid code would emit compile errors unnecessarily. The redesign addresses a common pattern in modern Zig where types serve dual purposes as both data structures and namespaces.