On 24/07/12 15:34, Andrei Alexandrescu wrote:
One idea would be to take a real, non-trivial application, written in both D and
another compiled language. We then can measure build times for both
applications, and also measure the relative speeds of the generated executables.
Suggest that this gets done with all 3 of the main D compilers, not just DMD.
I'd like to see the tradeoff between compilation speed and executable speed that
one gets between them.
I do have some pretty much equivalent simulation code written in both D and C++.
For a rough comparison:
Language Compiler Compile time (s) Runtime (s)
D GDC 1.5 25.3
D DMD 0.4 52.1
C++ g++ 2.3 21.8
C++ Clang++ 1.8 27.6
DMD used is a fairly recent pull from GitHub; GDC is the 4.6.3 package found in
Ubuntu 12.04. I don't have a working LDC2 compiler on my system. :-(
The C++ has a template-based policy class design, while the D code uses template
mixins to similar effect. The D code can be found here:
https://github.com/WebDrake/Dregs
While I'm happy to also share the C++ code, I confess I'm shy to do so given
that it probably represents a travesty of the beautiful ideas Andrei developed
on policy class design ... :-)
Best wishes,
-- Joe
