CMake 3.16 added support for precompiled headers & unity builds - what you need to know

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Modules are coming in C++20 but it will take a while before they are widely adopted, optimized and supported by tooling - what can we do right now?

CMake 3.16 added support for precompiled headers & unity builds - what you need to know

by Viktor Kirilov

From the article:

CMake 3.16 introduced native support for precompiled headers and unity builds - we no longer need to rely on clunky 3rd party CMake scripts! This is a complete guide on what the 2 techniques are, how to apply them and what to look out for. Builds could easily drop to less than 20% of the time they originally took.

Slow builds don’t just waste time - they also break the ‘flow’ (context switching) and discourage refactoring and experimentation - how do you put a price on that?

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