Polars was benchmarked against several other solutions on the TPCH benchmark scale factor 10. All queries are open source and up open for PR's here. The benchmarks ran on a GCP n2-highmem-16. This is still a work in progress and more queries will be coming soon.
Note that vaex was not able to finish all queries due to internal errors or unsupported functionality (e.g. joining on multiple columns).