Mask bool iterator

[onursatici]

Summary

Bool iterator to mask to be used by code that gets the bool values from a mask in a loop

[codspeed-hq]

Merging this PR will degrade performance by 11.08%

⚠️ 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 regressed benchmarks
✅ 1505 untouched benchmarks

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	chunked_varbinview_canonical_into[(100, 100)]	269.9 µs	305.3 µs	-11.57%
❌	Simulation	bitwise_not_vortex_buffer_mut[128]	246.1 ns	275.3 ns	-10.6%

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 os/mask-iter (44cd55a) with develop (583b003)}

[joseph-isaacs]

This looks like a very slow way to iterate. We should use a u64 packed validity iterator.

I am not sure if we should merge then and then that. But each call site will change

[robert3005]

BitIterator works on u64 words, not sure what do you mean @joseph-isaacs ?