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Store first value in Dict directly in innerjoin #29

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Store first value in Dict directly in innerjoin #29

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Commits on Aug 28, 2020

  1. Store first value in Dict directly in innerjoin 

    This avoids allocating a Vector for the case where l does not have
multiple indices with the same value. For the smoke-test benchmark in
<JuliaData/DataFrames.jl#2340 (comment)>,
this reduces allocations by half and overall runtime by 10%.
    @non-Jedi
    non-Jedi committed Aug 28, 2020
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