How should I detect bottleneck of compile time in a large C++ project?

Question

I want to reduce compile time of a large C++ project. I tried to use precompiled headers, interface and etc. But before I move on, I want to know whether any tool which helps de

Answer 1

one approach i like is to review the preprocessor output of a few of your sources -- just read some of it from the compiler's perspective rather than the somewhat abstracted representation that is #inclusion. chances are you will find some large chunks of includes/libraries you don't need and weren't necessarily aware of the existence (or need) of the dependency/include. from there, decide which dependencies can be removed. even if your dependencies were all correct, large outputs can also suggest how you might approach dividing larger modules into smaller pieces.