Andrei's Google Talk

[Andrei Alexandrescu]

bearophile wrote:
> Adam Ruppe:
>> D2's (relative) slowness I've tracked down to import std.stdio; - it
>> instantiates a bunch of templates just on import. We should be able to
>> fix this with a little work, and put D even further ahead of the
>> competition.
> 
> I have done two little benchmarks, using dmd 2.047, compiling just with "dmd test.d":
> 
> import std.c.stdio: printf;
> void main() {
>     printf("%d\n", 10);
> }
> 
> 
> import std.stdio: writeln;
> void main() {
>     writeln(10);
> }
> 
> The program with printf compiles in 0.05 seconds, and the binary is 101_404 bytes, while the program with writeln compiles in about 0.30 seconds and produces a binary of 235_036 bytes, the asm shows tons of templates and functions.
> 
> Bye,
> bearophile

I've improved on this a bit, and further improvements are easy. If you 
print strings, write and writeln simply forward to printf. Similar 
special casing can be done for simple and frequent cases.

BTW, speed of compilation of very short programs is not very relevant as 
long as it's reasonably good.


Andrei