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

[Marcus G. Daniels]

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

PJ> While profiling an application written in Obj-C, I trace a
PJ> bottleneck back to one specific method. It is a method that
PJ> updates a lattice, and it works by beginning at a point, and then
PJ> taking cells within a "radius" and updating them.

What you are doing is a lot of iterations! 

size^2 * OPINIONS * radius^2 

Also, aren't you worried about artifacts from the left-to-right and
top-to-bottom around the inner radius updates?

I'm sure plenty of us would appreciate it if you implemented MPI or
multithread parallel radius operators...

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