[SPARK-10100][SQL] Eliminate hash table lookup if there is no grouping key in aggregation. #8332
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…g key in aggregation. This improves performance by ~ 20% in one of my local test.
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Test build #41309 has finished for PR 8332 at commit
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LGTM. merging to master and branch 1.5. |
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…ng key in aggregation. This improves performance by ~ 20 - 30% in one of my local test and should fix the performance regression from 1.4 to 1.5 on ss_max. Author: Reynold Xin <[email protected]> Closes #8332 from rxin/SPARK-10100. (cherry picked from commit b4f4e91) Signed-off-by: Yin Huai <[email protected]>
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This improves performance by ~ 20 - 30% in one of my local test and should fix the performance regression from 1.4 to 1.5 on ss_max.