Consider 1911 #1927
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Consider 1911 #1927
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Replace hot FDIVs with FMULs through precomputing inverse values outside the loops. FDIVs are always more expensive than FMULs, although the amount varies per CPU microarchitecture.
Replace expensive computations
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Now multiplying by pre-computed reciprocals rather than performing divisions in loops in simplex solver: LP performance improvement ~2.5%