chore: add macos walltime profiling support

[not-matthias]

No description provided.

[codspeed-hq]

Merging this PR will improve performance by 21.4%

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

⚡ 2 improved benchmarks
✅ 46 untouched benchmarks
🆕 1 new benchmark
⏩ 1 skipped benchmark¹

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
⚡	BenchmarkExternalFib	60 ns	45 ns	+33.33%
⚡	bench_collect_results[5000000, 25]	3 s	2.7 s	+10.53%
🆕	BenchmarkFibonacciDarwin	N/A	259.6 µs	N/A

Tip

Curious why this is faster? Comment @codspeedbot explain why this is faster on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing cod-2639-bump-instrument-hooks-in-codspeed-go-to-support-macos (f6291c8) with main (4d99425)}

Footnotes

1. 1 benchmark was skipped, so the baseline result was used instead. If it was deleted from the codebase, click here and archive it to remove it from the performance reports. ↩