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by mhh__ 1876 days ago
The D compiler takes about 25 minutes, GCC + D frontend tests takes about an hour.

There is absolutely a huge amount of room for performance in areas like this. With Python especially it's very common so think "Ah yes but numpy", when it comes to performance, and that is true in steady state where you are just number crunching, but there is mindnumbingly large amounts of performance left on the table vs. even a debug build with a compiler. Testing in particular is lots of new code running for a short amount of time, so it's slow when interpreted.