LuciferYang opened a new pull request, #37339:
URL: https://github.com/apache/spark/pull/37339
### What changes were proposed in this pull request?
This pr add a micro-benchmark for `o.a.spark.util.Utils#getIteratorSize`
method.
### Why are the changes needed?
`Utils#getIteratorSize` method was added due to
`scala.collection.Iterator#size` uses a for loop and it is slightly slower in
the current version of Scala.
When adding this method, Spark uses Scala 2.10. Currently, Spark use Scala
2.12. this pr add introduce `IteratorSizeBenchmark` to ensure that the
conclusion is still correct when upgrading the major version of Scala,
otherwise we should use `Iterator#size` directly.
### Does this PR introduce _any_ user-facing change?
No, just for test
### How was this patch tested?
Pass GitHub Actions.
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