add parquet test data

[yaqi-zhao]

No description provided.

[pitrou]

Hi @yaqi-zhao ,

1. Can you clarify the PR title and description to explain what this is about?
2. Can you fill in information about the data files in https://github.com/apache/parquet-testing/blob/master/data/README.md?

[yaqi-zhao]

Hi, @pitrou I submitted a PR to Apache/Arrow(apache/arrow#14585) and add a benchmark test which will use these files. The test intend to analyze the parquet reader performace with the different bit width packing.

[pitrou]

How long does it take to generate those files on the fly from the benchmarks?

In general parquet-testing is for interoperability testing between different Parquet implementations, not for benchmarking of individual implementations.

At worse we could use arrow-testing for that, but even then we should strive to make the files much smaller. We don't want to consume hundreds of MB just for a single set of benchmarks, IMHO.