While investigating Bonsai performance, it turned out that the microbenchmark suite doesn't have almost any complex queries that resemble realistic ones. I used several such queries in order to analyze performance degradtions, and test various performance improvements. This ticket is about adding those queries, and probably some more similar ones to the master branch of mongo-perf. The attached diff contains several relatively complex queries. The diff should be applied to the https://github.com/mongodb/mongo-perf repo.