Community Tutorial: How To Optimize C++ Compile Time, Increase Efficiency of Intellisense

General Tutorial & Course Discussions
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This will include how to optimize compile time in C++ in order to increase efficiency.

https://dev.epicgames.com/community/learning/tutorials/Revm/unreal-engine-how-to-optimize-c-compile-time-increase-efficiency-of-intellisense

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I have to say thank you dude for your help. Your guide greatly decreased compile time for my UE5 project. Going from 6+ min compile time to few seconds. That’s insane thank you. You rock

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i don’t know i mast set the bUseUnityBuild’s value is true can compiling faster

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but it will hide many include problems which will bite you later.

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Biggest impact on C++ compile time in Unreal is reducing header dependencies. Use forward declarations in headers and move #includes into .cpp files wherever possible. Follow “Include What You Use” and avoid heavy headers like Engine.h unless necessary. Keep classes loosely coupled so small changes don’t trigger large rebuilds. Clean dependency chains = faster compile + better IntelliSense.