Upgrade Spark to 3.2.0 and Scala to 2.13.7

[vincenzobaz]

No description provided.

[lbulej]

Thank you for the contribution! Similar PR (#327) was already in the making and just went in, so I'm closing this. However, seeing your affiliation, I have to ask: would you be perhaps interested in cleaning up some of the dependencies to make them compatible with Scala 2.13?

[vincenzobaz]

Hello @lbulej, my bad I did not check the other opened PRs.
I wanted to see if performances were improving with this upgrade I submitted a PR without too much thinking.
I was also looking into compatibility of (Spark 3.2.0, Scala 2.13, JDK 17). What is your experience with this triplet?

What do you mean by

some of the dependencies to make them compatible with Scala 2.13

dependencies of this benchmark or of other modules?

[lbulej]

Hello @lbulej, my bad I did not check the other opened PRs. I wanted to see if performances were improving with this upgrade I submitted a PR without too much thinking. I was also looking into compatibility of (Spark 3.2.0, Scala 2.13, JDK 17). What is your experience with this triplet?

Not much yet -- we typically start systematically measuring it just before release. However, we are trying to move from older Scala versions and Spark 3.2 was a chance to move a bunch of benchmarks to Scala 2.13.

What do you mean by

some of the dependencies to make them compatible with Scala 2.13

dependencies of this benchmark or of other modules?

Dependencies of other benchmarks (see #324). The reactors benchmark uses the Reactors framework, which I already bumped to 2.12, but it needs pushing to 2.13 (https://github.com/renaissance-benchmarks/dependency-reactors). The scala-stm benchmark relies on Scala STM library, which also needs a push towards 2.13, but we don't have a forked repository for it (yet).