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Editorial Team
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Asked: 2026-06-07T15:15:16+00:00

Trivial programs are taking around 2 seconds to compile every time I run g++

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Trivial programs are taking around 2 seconds to compile every time I run g++ in Terminal on my new MBP. Whereas when I ssh into my school’s network they compile almost instantly. Same thing with my old macbook. Why is this one, with a brand new OS and lots of processing power, taking forever to compile.

Could this be because of where my compiler has been stored from when I downloaded g++ from Apple’s website? Or, if that is out of the question, is there any other reason why this would happen? If so, how do I fix it? I’ve googled and found nothing.

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1 Answer

  1. Editorial Team

    No, it doesn’t take 2 to 5 second to compile. Especially on MBP, unless it is like 10 years old maybe. I have Air (OS X 10.7.4, LLVM G++ 4.2, 1.8 GHz Intel Core i7) and it takes roughly half a second:

    $ uname -a
Darwin air 11.4.0 Darwin Kernel Version 11.4.0: Mon Apr  9 19:32:15 PDT 2012; root:xnu-1699.26.8~1/RELEASE_X86_64 x86_64 
$ echo 'int main() { return 0; }' > ./test.cpp
$ time g++ -o test ./test.cpp 

real    0m0.561s
user    0m0.021s
sys 0m0.411s

    You either measure time incorrectly or have something else that is screwing things up for you a big time, in which case you have to see what’s going on in the system (i.e. using a profiler).

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