Add benchmarking / track in CI

[timkpaine]

For perspective, we (but mostly @texodus) have setup really great benchmarking which allows us to track granular release-to-release performance metrics. Example:

PR: finos/perspective#2315

We have the profiler, but we should setup a benchmark suite and run it in CI (as perspective does).

[trallard]

Noting it would be good to explore using asv for benchmarking across releases https://github.com/airspeed-velocity/asv