Revert "Lazily untranspose DeltaArray validity and depend on fastlanes bit transpose code"

[joseph-isaacs]

Reverts #8725

[robert3005]

:(

[github-actions]

Polar Signals Profiling Results

Latest Run

Status	Commit	Job	Attempt	Link
🟢 Done	dde16d7		1	Explore Profiling Data

---

Powered by Polar Signals Cloud

[github-actions]

Benchmarks: Vortex queries 📖

Verdict: No clear signal (low confidence)
Attributed Vortex impact: +5.3%
Engines: DataFusion No clear signal (+7.0%, low confidence) · DuckDB No clear signal (+3.7%, low confidence)
Vortex (geomean): 1.049x ➖
Parquet (geomean): 1.022x ➖
Shifts: Parquet (control) +2.2% · Median polish +4.6%

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.

---

datafusion / vortex-file-compressed (1.087x ➖, 0↑ 0↓)

name	PR dde16d7 (ns)	base 1259557 (ns)	ratio (PR/base)
vortex_q00/datafusion:vortex-file-compressed	10238206	9382395	1.09
vortex_q01/datafusion:vortex-file-compressed	6529500	6025257	1.08

datafusion / parquet (1.016x ➖, 0↑ 0↓)

name	PR dde16d7 (ns)	base 1259557 (ns)	ratio (PR/base)
vortex_q00/datafusion:parquet	20772512	20028507	1.04
vortex_q01/datafusion:parquet	4759020	4779198	1.00

duckdb / vortex-file-compressed (1.065x ➖, 0↑ 0↓)

name	PR dde16d7 (ns)	base 1259557 (ns)	ratio (PR/base)
vortex_q00/duckdb:vortex-file-compressed	10621558	9829718	1.08
vortex_q01/duckdb:vortex-file-compressed	6203834	5909368	1.05

duckdb / parquet (1.028x ➖, 0↑ 0↓)

name	PR dde16d7 (ns)	base 1259557 (ns)	ratio (PR/base)
vortex_q00/duckdb:parquet	23797942	23302296	1.02
vortex_q01/duckdb:parquet	9703044	9385906	1.03

---

No file size changes detected.