On Monday 13 June 2011, 17:46:23, Grigory Sarnitskiy wrote: > I've noted several times that GHC doesn't evaluate formulas for Double > values during compilation. > > That is using > 4.2326514735445615 instead of (512 / 0.844)**(1/3) > or > 0.906179845938664 instead of (1/3) * sqrt(5 + 2 * sqrt(10 / 7)) > > This can lead to significant slowdown if such values are called often. > It's not always convenient to use where or let to reduce the number of > calculations of such constants so I wonder how to force GHC to evaluate > them during compilation?
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