Write specific benchmarks for CodSpeed

[hynek]

Just adding benchmarking to functional tests is a bit too noisy.

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #1306 will create unknown performance changes

_{Comparing simplify-benchmarks (d362335) with main (0a09c1a)}

Summary

🆕 8 new benchmarks ⁉️ 12 (👁 12) dropped benchmarks

Benchmarks breakdown

	Benchmark	main	simplify-benchmarks	Change
🆕	test_create_frozen_class	N/A	1.7 s	N/A
🆕	test_create_simple_class	N/A	1.5 s	N/A
🆕	test_create_simple_class_make_class	N/A	1.5 s	N/A
🆕	test_eq_equal	N/A	1.1 ms	N/A
🆕	test_eq_unequal	N/A	1.1 ms	N/A
🆕	test_hash	N/A	1.2 ms	N/A
🆕	test_instantiate_no_defaults	N/A	1.3 ms	N/A
🆕	test_instantiate_with_defaults	N/A	1.3 ms	N/A
👁	test_asdict[C1Slots]	112 µs	N/A	N/A
👁	test_asdict[C1]	124.3 µs	N/A	N/A
👁	test_auto_exc[False-False]	3.5 ms	N/A	N/A
👁	test_auto_exc[False-True]	3.5 ms	N/A	N/A
👁	test_auto_exc[True-False]	3.6 ms	N/A	N/A
👁	test_auto_exc[True-True]	3.6 ms	N/A	N/A
👁	test_default_decorator	1.8 ms	N/A	N/A
👁	test_fields[C2Slots]	139.2 µs	N/A	N/A
👁	test_fields[C2]	151.6 µs	N/A	N/A
👁	test_programmatic	17.5 ms	N/A	N/A
👁	test_unsafe_hash[False]	1.4 ms	N/A	N/A
👁	test_unsafe_hash[True]	1.5 ms	N/A	N/A