On Thursday 09 September 2010 19:40:47 Dr. Smith wrote:
> The class code below runs terribly slow. Conversely, when converted into a
> function (albeit returning only one value), it runs fast. Any insights
> into this or suggestions to get a function to return multiple types at
> once?
>
> ...library code...
>
> module testlib;
> import std.stdio, std.string;
>
> class classtest {
>
> int i, j;
>
> double[][] hit() {
>
> double[][] hi = new double[][](1000, 40);
>
> for(i = 1; i < 1000; i++) {
> for(j = 1; j < 40; j++) {
> hi[i][j] = (i);
> }
> }
> return hi;
> }
>
> double[][] hot() {
>
> double[][] ho = new double[][](1000, 40);
>
> for(i = 1; i < 1000; i++) {
> for(j = 1; j < 40; j++) {
> ho[i][j] = (j);
> }
> }
> return ho;
> }
>
> string stest () {
> string hello = "yo!";
> return hello;
> }
> }
>
> ... calling code ...
>
> import std.stdio, std.string;
> import testlib;
>
> void main() {
>
> classtest obj = new classtest;
> int i, j;
>
> for(i = 1; i < obj.hit.length; i++) {
> for(j = 1; j < obj.hit[i].length; j++) {
> writefln("%s\t%f\t%f", obj.stest, obj.hit[i][j], obj.hot[i][j]);
> }
> }
> }
By the way, it looks like what you're trying to do could be shrunk down to
import std.stdio;
void main()
{
for(float i = 1; i < 1000; ++i)
{
for(float j = 1; j < 40; ++j)
writefln("yo!\t%f\t%f", i, j);
}
}
and that runs _way_ faster. I don't understand why you're doing anything with
arrays in the first place given what you're printing. But maybe you're just
trying to show a simplified test case.
- Jonathan M Davis
