bool array slice to support device buffers

[onursatici]

Rationale for this change

bool slicing on device buffers currently panic, because we assert host buffers when using slice on BitBuffer

What changes are included in this PR?

extract the slicing bounds check logic from BitBuffer, use it for both the host and the device buffer backed bool arrays

[github-actions]

Polar Signals Profiling Results

Latest Run

Status	Commit	Job	Attempt	Link
🟢 Done	1320562		1	Explore Profiling Data

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Powered by Polar Signals Cloud

[github-actions]

Benchmarks: Vortex queries 📖

Verdict: No clear signal (medium confidence)
Attributed Vortex impact: -8.5%
Engines: DataFusion No clear signal (+0.0%, low confidence) · DuckDB Likely improvement (-16.2%, environment too noisy confidence)
Vortex (geomean): 0.756x ✅
Parquet (geomean): 0.790x ✅
Shifts: Parquet (control) -21.0% · Median polish -27.5%

How to read Verdict and Engines

• Verdict: Overall PR-level signal after subtracting baseline drift estimated from Parquet control rows. It can be Likely improvement, Likely regression, or No clear signal.
• Engines: Per-engine attribution. DataFusion is compared against DataFusion/Parquet controls; DuckDB is compared against DuckDB/Parquet controls. This answers whether each engine improved or regressed independently.
• Confidence: Based on directional consistency, share of rows above the noise floor, and control-run noise.

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datafusion / vortex-file-compressed (0.725x ✅, 2↑ 0↓)

name	PR 1320562 (ns)	base 6a79bcf (ns)	ratio (PR/base)
vortex_q00/datafusion:vortex-file-compressed 🚀	9730574	12687167	0.77
vortex_q01/datafusion:vortex-file-compressed 🚀	6360492	9277786	0.69

datafusion / parquet (0.725x ✅, 2↑ 0↓)

name	PR 1320562 (ns)	base 6a79bcf (ns)	ratio (PR/base)
vortex_q00/datafusion:parquet 🚀	19666698	26417776	0.74
vortex_q01/datafusion:parquet 🚀	4503936	6382585	0.71

duckdb / vortex-file-compressed (0.722x ✅, 2↑ 0↓)

name	PR 1320562 (ns)	base 6a79bcf (ns)	ratio (PR/base)
vortex_q00/duckdb:vortex-file-compressed 🚀	9864991	13436387	0.73
vortex_q01/duckdb:vortex-file-compressed 🚀	5864933	8263765	0.71

duckdb / parquet (0.862x ✅, 2↑ 0↓)

name	PR 1320562 (ns)	base 6a79bcf (ns)	ratio (PR/base)
vortex_q00/duckdb:parquet 🚀	23294058	28024281	0.83
vortex_q01/duckdb:parquet 🚀	9400903	10522304	0.89

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No file size changes detected.

[codspeed-hq]

Merging this PR will improve performance by 25.72%

⚠️ 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
✅ 1837 untouched benchmarks
⏩ 3 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	copy_nullable[65536]	1.4 ms	1 ms	+31.9%
⚡	Simulation	copy_non_nullable[65536]	1,094.3 µs	913.2 µs	+19.83%

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 os/bitbuffer-slice (1320562) with develop (6a79bcf)}

Footnotes

1. 3 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩