Kitware published new guidance on October 11 showing how CMake’s Instrumentation API can expose where software builds and tests are actually spending time.

The Kitware walkthrough says instrumentation can collect timing and system data across configure, generate, build, test and install steps. Developers can then use callbacks to summarize slow commands, memory-heavy compilation jobs or test bottlenecks automatically.

The official CMake documentation describes the same API as a way to collect timing, target and diagnostic information throughout a project workflow.

Martin Duffy of Kitware explains CMake instrumentation for build and test performance.

This extends the same build workflow BitcoinVersus.Tech covered in CMake Tools 1.24. It also fits a broader shift toward measurable CI performance seen in Rust 1.99’s Cargo changes and the infrastructure scaling behind GitHub’s recent rebuild.

CMake developer Cristian Adam highlighted the project’s move to the 4.x generation, where the instrumentation work has continued maturing.

Bottom line: CMake can now turn “the build feels slow” into measurable traces that show which commands, tests or machines are responsible.

Editor’s Note

This story describes Kitware’s published instrumentation capabilities; actual performance gains depend on what developers find and change after profiling.

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