On Wednesday, November 10, 2010 08:33:45 Xie wrote:
> Can't run a simple program. What's wrong, GC?
>
> import std.stdio;
> import std.date;
>
> void f0()
> {
> wstring a[];
>
> foreach(i; 0 .. 100_000_000)
> {
> a ~= " "w;
> }
> }
>
> void main()
> {
> auto r = benchmark!(f0)(1);
> writeln(r, "ms");
> }
>
> DMD 2.047
You just tried to create an array with 100_000_000 elements, and arrays try and
maintain extra capacity for extra appending, so you're actually trying to
create
one bigger than that. That's a _lot_ of memory, and it's _contiguous_ memory.
You probably hit some sort of memory limit in there somewhere and would have
the
same problem if you tried to create an array that large in C or C++. That's an
_enormous_ array. Maybe it's a 32-bit barrier which will go away once 64-bit
dmd
is complete, but it's not exactly normal to try and use an array wich 100
million elements in it. The computer does have limits you know.
- Jonathan M Davis
