Github user wangyum commented on a diff in the pull request: https://github.com/apache/spark/pull/22906#discussion_r229723135 --- Diff: core/src/test/scala/org/apache/spark/io/CompressionCodecSuite.scala --- @@ -128,6 +130,69 @@ class CompressionCodecSuite extends SparkFunSuite { } } + test("SPARK-25895 Zstd shuffle Read/Write/spill comparison w.r.t lz4") { --- End diff -- How about add a benchmark? You can check our all benchmarks here:: https://issues.apache.org/jira/browse/SPARK-25475
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