5 ms·

The authors talk a lot about how fast the compiler is. It doesn't matter if the compiler is fast if the generated code is slow.

• stabbles 8y ago
  Debug builds in C++ can be slow AND generate slow code.
• dan-robertson 8y ago
  Imagine the simplest “compiler” for python or perl or JavaScript that doesn’t compile anything but just interprets it. There’s a lot of advantages to not having to wait for compilation. One can write a large and useful program with reasonable speed ups just from stupid compilation as many programs don’t need to be particularly fast. One can imagine modifying the compiler to output llvm bitcode. You now can throw plenty of optimisation at it for free (but you are now slower to compile). This may be useful for prod but I claim a lot of the time it’s still useful for dev to have a simple very very fast compiler. Think less about the time to build one file and more of the time to rebuild your entire tree (or just a file which many things depend on)
  • bartl 8y ago
    > One can imagine modifying the compiler to output llvm bitcode. You now can throw plenty of optimisation at it for free (but you are now slower to compile). If you look at the FAQ, you'll see they can do exactly that but using gcc/Clang, not LLVM.
    • K2L8M11N2 8y ago
      Isn't Clang LLVM?
• amedvednikov 8y ago
  Like the website says, if you need performance, you do production builds, which use GCC/Clang with -O2. In the future V will have its own optimiser.