[SPARK-9759] [SQL] improve decimal.times() and cast(int, decimalType) #8052
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Test build #40246 has finished for PR 8052 at commit
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@JoshRosen Does this small patch look good to you? |
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LGTM |
asfgit
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Aug 10, 2015
This patch optimize two things: 1. passing MathContext to JavaBigDecimal.multiply/divide/reminder to do right rounding, because java.math.BigDecimal.apply(MathContext) is expensive 2. Cast integer/short/byte to decimal directly (without double) This two optimizations could speed up the end-to-end time of a aggregation (SUM(short * decimal(5, 2)) 75% (from 19s -> 10.8s) Author: Davies Liu <[email protected]> Closes #8052 from davies/optimize_decimal and squashes the following commits: 225efad [Davies Liu] improve decimal.times() and cast(int, decimalType) (cherry picked from commit c4fd2a2) Signed-off-by: Reynold Xin <[email protected]>
CodingCat
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Aug 17, 2015
This patch optimize two things: 1. passing MathContext to JavaBigDecimal.multiply/divide/reminder to do right rounding, because java.math.BigDecimal.apply(MathContext) is expensive 2. Cast integer/short/byte to decimal directly (without double) This two optimizations could speed up the end-to-end time of a aggregation (SUM(short * decimal(5, 2)) 75% (from 19s -> 10.8s) Author: Davies Liu <[email protected]> Closes apache#8052 from davies/optimize_decimal and squashes the following commits: 225efad [Davies Liu] improve decimal.times() and cast(int, decimalType)
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This patch optimize two things:
This two optimizations could speed up the end-to-end time of a aggregation (SUM(short * decimal(5, 2)) 75% (from 19s -> 10.8s)