Prototype using cancellation counters

[MichaReiser]

No description provided.

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[codspeed-hq]

Merging this PR will not alter performance

⚡ 2 improved benchmarks
❌ 3 regressed benchmarks
✅ 21 untouched benchmarks

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Memory	new[SupertypeInput]	165 B	181 B	-8.84%
❌	Memory	new[Input]	97 B	105 B	-7.62%
❌	Simulation	new[Input]	9.7 µs	10.2 µs	-5.06%
⚡	Simulation	amortized[InternedInput]	2.1 µs	2 µs	+5.85%
⚡	Simulation	mutating[30]	14.7 µs	13.8 µs	+6.68%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing MichaReiser:micha/cancellation-counter (88f582a) with master (7e77c49)}