[ergonomics] profile driver and base module imports

[skrawcz]

Current behavior

It takes ~2 seconds to do:

from hamilton import driver, base

We should profile this and see where the time is being spent.

Library & System Information

Latest hamilton on macOS, python 3.10.

Expected behavior

It should load in < 1 second.

Additional context

This is a quality of life task.

This task requires:

1. to use a profiler to figure out where time is being spent
2. report the results
3. provide recommendations

[elijahbenizzy]

Blech, pandas gets imported regardless. Second time importing after a fresh install it's faster, but still not great.

First time:

Second time:

[skrawcz]

import pandas as pd

Takes ~1 second for me. So that's not all of the issue.