On Tue, 2015-09-08 at 07:33 +0000, Dominikus Dittes Scherkl via
Digitalmars-d-learn wrote:
> On Tuesday, 8 September 2015 at 05:50:30 UTC, Russel Winder wrote:
> > void main() {
> > immutable imax = 10;
> > immutable jmax = 10;
> > float[imax][jmax] x;
> > foreach(int j; 1..jmax){
> > foreach(int i, ref item; parallel(x[j-1])){
> > x[j][i] = complicatedFunction(i, item);
> > }
> > }
> > }
> >
> > (though sadly, this doesn't compile for a reason I can't fathom
> > instantly)
> Hmm. Shouldn't you instead parallel the outer loop?Can't do that because it is a pipeline: the current computation is input to the next one. As far as I can tell there is no way the code as presented can be parallelized in the general case. If there were some guarantees on complicatedFunction, then it is a different game. -- Russel. ============================================================================= Dr Russel Winder t: +44 20 7585 2200 voip: sip:russel.win...@ekiga.net 41 Buckmaster Road m: +44 7770 465 077 xmpp: rus...@winder.org.uk London SW11 1EN, UK w: www.russel.org.uk skype: russel_winder
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