On Sun, Oct 14, 2012 at 10:39 AM, Joe Groff <[email protected]> wrote:
> On Sun, Oct 14, 2012 at 10:20 AM, John Mija <[email protected]> wrote: > > This email is related to one sent to the Go mailing list[1] about the > > great difference in compiling time between Rust which took 50 minutes, > > and Go with a time of 2 minutes in build compiler, all libraries, all > > commands and testing. > > > > It looks that it is possible because it has been written in C, instead > > of use C++. It is also interesting to know that the Go compiler has been > > based in the Plan9 C compilers[2]. > > > > > > [1]: > > > https://groups.google.com/forum/?fromgroups=#!topic/golang-nuts/bKDfVp0dzKw > > [2]: http://doc.cat-v.org/bell_labs/new_c_compilers/ > > http://doc.cat-v.org/plan_9/4th_edition/papers/compiler > > > > Note: do not take this email like negative, I only hope that Rust can go > > to better in time. > > One factor is that Rust includes its own branch of LLVM as a > submodule, and LLVM takes quite a long time to compile on its own. > The build includes not only all of LLVM, but Clang as well. Also note that the Rust compiler compiles itself 3 times, to ensure that the self-bootstrap process is stable. So your 50 minutes includes 1 build of a commercial grade C/C++ compiler, and 3 builds of the Rust compiler itself. -- Elliott Slaughter "Don't worry about what anybody else is going to do. The best way to predict the future is to invent it." - Alan Kay
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