MaxGekk commented on issue #28091: [WIP][SQL] Optimize fromJavaDate() and toJavaDate() URL: https://github.com/apache/spark/pull/28091#issuecomment-612644143 I am closing this PR because the final results look not so good: ```diff OpenJDK 64-Bit Server VM 1.8.0_242-8u242-b08-0ubuntu3~18.04-b08 on Linux 4.15.0-1063-aws Intel(R) Xeon(R) CPU E5-2670 v2 @ 2.50GHz Load dates from ORC: Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative ------------------------------------------------------------------------------------------------------------------------ -after 1582, vec off 39651 39686 31 2.5 396.5 1.0X -after 1582, vec on 3647 3660 13 27.4 36.5 10.9X -before 1582, vec off 38155 38219 61 2.6 381.6 1.0X -before 1582, vec on 4041 4046 6 24.7 40.4 9.8X +after 1582, vec off 76436 77047 877 1.3 764.4 1.0X +after 1582, vec on 3790 3797 10 26.4 37.9 20.2X +before 1582, vec off 52369 52460 105 1.9 523.7 1.5X +before 1582, vec on 4171 4182 10 24.0 41.7 18.3X ```
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