> Furthermore, it turns out that MPS instruction is *very* *very*
> common. Why do we call CURRENT_Ppem here? The comment suggest that
> the decision was arbitrary and, perhaps, wasteful. I see a huge
> number of trivial FT_MulFix's by 1.0 still.
Measuring ppem and pt values are done along the projection vector, so
they *must* be recomputed each time since this value can change any
time. However, it certainly makes sense to catch factor `1.0'
explicitly instead of performing a multiplication. So please
optimize :-)
Werner
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