Would the proposal here be to make constexpr std::chrono give the invocation time or some fixed now time for the whole compilation?

I'm just imagining:

consteval void who_needs_fast_compilation_anyway() {

    auto start = std::chrono::system_clock::now();

    while(std::chrono::system_clock::now() < start + std::chrono::minutes(1)) {}

}

Cheers,

Jeremy

test.cpp:135:5: error: call to consteval function 'who_needs_fast_compilation_anyway' is not a constant expression

  135 |     who_needs_fast_compilation_anyway();

      |     ^

test.cpp:52:9: note: constexpr evaluation hit maximum step limit; possible infinite loop?

   52 |         {

      |         ^

which seems like a reasonable result to me.  Garbage in / garbage out sort of thing...

Howard