Performance profiling

[strawgate]

I'd like to do a one-off performance profiling test (or maybe a pytest) with a high number of entities to test memory/CPU usage and make sure there's nothing we're doing anywhere that is particularly bad.

[strawgate]

It looks like there is a profiling integration so this might be easier than I thought

[strawgate]

Top hot functions based on 0.7.0

Seems like there might be an opportunity to optimize sanitizing attributes and sanitizing datastream names.

The simplest solution is probably to just cache the sanitized names

[strawgate]

Cache datastream and attribute normalization:
Issue: #293
PR: #294

[strawgate]

Reduce attribute counts:

Issue: #297

PR: #298

[strawgate]

Issue: #310

PR: #311