Improve performance on very large models

[vchuravy]

Using Joes 'Enzymanigans#jlk9/with-simulation' test-case this lowers my current measurement time from 24min to 16min.

A lot of time is spent in the generated function compiling small instances of these functions.

[github-actions]

Benchmark Results

	main	ed0f73b...	main/ed0f73b1a20c4d...
basics/overhead	4.34 ± 0.01 ns	4.34 ± 0.01 ns	1
time_to_load	1.15 ± 0.021 s	1.41 ± 0.019 s	0.815

Benchmark Plots

A plot of the benchmark results have been uploaded as an artifact to the workflow run for this PR.
Go to "Actions"->"Benchmark a pull request"->[the most recent run]->"Artifacts" (at the bottom).