Barry Smith <[email protected]> writes: > All true. Switching the CG “norm” does not effect the algorithm (in > exact arithmetic) it only affects the norm that is printed and when > the algorithm stops. The same minimization principles hold > independent of the “norm” used.
Yup, and the natural norm avoids the need for an extra reduction. If you're using classic (non-pipelined and not single_reduction) CG in a latency-sensitive environment, then you might benefit from using the natural norm.
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