On Wednesday, 22 June 2016 at 13:46:50 UTC, qznc wrote:
Walter and we as a community often claim that dmd is fast as in
"compiles quickly". Go also claims this. Rust does not. They
even state that compilation speed is one of the big tasks they
are working on.
I found a comparison for D and Rust, which uses a bigger program:
Compile the respective package manager dub/cargo. They are (very
roughly) programs of the same complexity.
Short: DMD 21sec vs Rust 56sec
Longer:
➤ time dub build --force
Performing "debug" build using dmd for x86_64.
dub 1.0.0+commit.8.gcdfaf60: building configuration
"application"...
source/dub/internal/sdlang/lexer.d(16,8): Deprecation: module
std.stream is deprecated - It will be removed from Phobos in
October 2016. If you still need it, go to
https://github.com/DigitalMars/undeaD
Linking...
6.76user 0.96system 0:21.83elapsed 35%CPU (0avgtext+0avgdata
1106000maxresident)k
141800inputs+84280outputs (225major+325767minor)pagefaults 0swaps
➤ time cargo build
Compiling cargo v0.12.0 (file:///home/qznc/dev/rust/cargo)
54.02user 1.56system 0:56.00elapsed 99%CPU (0avgtext+0avgdata
629400maxresident)k
1144inputs+297400outputs (6major+459076minor)pagefaults 0swaps
Even more drastic is the user time: DMD 7sec vs Rust 54sec. I'm
not sure where DMD spends the rest of the time? Page faults?
