Speedup bin setup #3642
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Speedup bin setup #3642
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Previously the mappers computed (and allocated variables) containing the output bin sizes. These were then used to compute (and allocate variables for) output bin indices. As the sizes themselves are not needed, we can skip this and directly setup the indices. This saves around 20% when grouping few rows into O(1M) bins.
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Note the failing builds are "fixed" in #3643 by removing the offending code. |
Further reduce overhead in bin and group
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Am I overlooking something or is this the same as #3643 plus removal of an unused function? |
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Well, actually what I said above is wrong: This PR was optimizing a function that was removed by the follow-up PR. You are therefore correct that nothing happens here. |
jl-wynen
approved these changes
Jan 30, 2025
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Another part of #3637.
The improvements for small row counts should be quite substantial for streaming applications.