Re: Optimization: why don't I get no speedup?

[Marcus G. Daniels]

>>>>> "PJ" == Paul E Johnson <address@hidden> writes:

GCC can optimize the rightX+1, highY+1 stuff out of the loops if you use
-funroll-loops to compile your model.  You could also lift the pointer
visibleOpinion[i] outside of the xcoord, ycoord loops and maybe get a savings.

PJ> for( xcoord = leftX; xcoord < rightX+1; xcoord++ )
PJ>    {
PJ>      for( ycoord=lowY; ycoord < highY+1; ycoord++)
PJ>        {
PJ>          *D2D(visibleOpinion[i],gridOffsets,xcoord,ycoord) += levelHere;
PJ>        }
PJ>     }

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