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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2019/10/01 16:24:06 UTC

[GitHub] [spark] dongjoon-hyun commented on a change in pull request #25992: [SPARK-29320][TESTS] Compare `sql/core` module in JDK8/11 (Part 1)

dongjoon-hyun commented on a change in pull request #25992: [SPARK-29320][TESTS] Compare `sql/core` module in JDK8/11 (Part 1)
URL: https://github.com/apache/spark/pull/25992#discussion_r330151155
 
 

 ##########
 File path: sql/core/benchmarks/ColumnarBatchBenchmark-jdk11-results.txt
 ##########
 @@ -0,0 +1,59 @@
+================================================================================================
+Int Read/Write
+================================================================================================
+
+OpenJDK 64-Bit Server VM 11.0.4+11-LTS on Linux 3.10.0-862.3.2.el7.x86_64
+Intel(R) Xeon(R) CPU E5-2670 v2 @ 2.50GHz
+Int Read/Write:                           Best Time(ms)   Avg Time(ms)   Stdev(ms)    Rate(M/s)   Per Row(ns)   Relative
+------------------------------------------------------------------------------------------------------------------------
+Java Array                                          232            234           1       1409.7           0.7       1.0X
+ByteBuffer Unsafe                                   396            396           0        827.9           1.2       0.6X
+ByteBuffer API                                      602            603           0        544.0           1.8       0.4X
+DirectByteBuffer                                   1185           1186           2        276.6           3.6       0.2X
 
 Review comment:
   For JDK8, `DirectByteBuffer` took `743 (Best)` and `744 (Avg)`. JDK11 seems to be affected due to Apache Spark's `Platform.java` implementation which depends on `java.version` for now. How do you think about this?
   
   cc @srowen and @wangyum . 

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