On 15/04/12 05:41, jerro wrote:
I have never seen anything like that. Usually the minimal time to run a D
program is something like:
j@debian:~$ time ./hello
Hello world!
real 0m0.001s
user 0m0.000s
sys 0m0.000s
Yea, my experience too in general. I can't remember exactly what I was testing
but if it's what I think it was (and have just retested:-), the difference may
have been less pronounced (maybe 0.080s for D compared to 0.004 for C++) and
that would have been due to not enabling optimizations for D.
I have another pair of stupid D-vs.-C++ speed-test files where with
optimizations engaged, D beats C++: the dominant factor is lots of output to
console, so I guess this is D's writeln() beating C++'s cout.
What really amazes me is the difference between g++, DMD and GDC in size of
the executable binary. 100 orders of magnitude!
With GDC those flags(for gdmd):
-fdata-sections -ffunction-sections -L--gc-sections -L-l
help a lot if you want to reduce a size of executable. Besides, this overhead is
the standard library and runtime and won't be much larger in larger programs.
Ahh! I hadn't realized that the libphobos package on Ubuntu didn't install a
compiled version of the library. (DMD does.)
