Faster sparse model matrix construction #1070
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…ise for speed improvement
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Cc: @kleinschmidt |
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LGTM. It might be good to start doing some benchmarking of this stuff now (although that's an orthogonal issue to this PR). |
maximerischard
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Sep 28, 2016
…ise for speed improvement (JuliaData#1070)
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Addresses slow row-wise
SparseMatrixCSCindexing when building sparse model matrix columns by transposing the contrast matrix before reindexing column-wise, then transposing the result (rather than just reindexing row-wise).