Iaroslav Igoshev

Related one #3588.

@anmyachev did some work on this too so he and @RehanSD should contact each on the matter. Also, this blog might be useful for the issue - https://medium.com/analytics-vidhya/4-performance-improving-techniques-to-make-spark-joins-10x-faster-2ec8859138b4.

@arunjose696, can you revisit this?

A lot of improvements have been introduced recently to merge. Visit https://github.com/modin-project/modin/pull/6966 for the measurements. File a new issue if someone sees poor performance on a certain case of merge.

@dchigarev, can you revisit this?

cc @anmyachev

mask is implemented in Modin so closing this issue.

I overlooked, we are still d2p. Thanks.

@anmyachev, can you revisit this?

@anmyachev, should we close the issues you linked above in the comment?