Validate segment offsets when populating initial segments

[robert3005]

This shouldn't panic and instead can error

[github-actions]

Polar Signals Profiling Results

Latest Run

Status	Commit	Job	Attempt	Link
🟢 Done	21be72b		1	Explore Profiling Data

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Powered by Polar Signals Cloud

[github-actions]

Verdict: No clear signal (low confidence)
Attributed Vortex impact: +2.7%
Engines: DataFusion No clear signal (+8.0%, medium confidence) · DuckDB No clear signal (-2.3%, low confidence)
Vortex (geomean): 0.985x ➖
Parquet (geomean): 0.972x ➖
Shifts: Parquet (control) -2.8% · Median polish -1.7%

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 (1.024x ➖, 0↑ 0↓)

name	PR 21be72b (ns)	base 7cf53cb (ns)	ratio (PR/base)
vortex_q00/datafusion:vortex-file-compressed	9749998	9632925	1.01
vortex_q01/datafusion:vortex-file-compressed	6265785	6047747	1.04

datafusion / parquet (0.949x ➖, 0↑ 0↓)

name	PR 21be72b (ns)	base 7cf53cb (ns)	ratio (PR/base)
vortex_q00/datafusion:parquet	19875797	20532528	0.97
vortex_q01/datafusion:parquet	4486517	4826794	0.93

duckdb / vortex-file-compressed (0.972x ➖, 0↑ 0↓)

name	PR 21be72b (ns)	base 7cf53cb (ns)	ratio (PR/base)
vortex_q00/duckdb:vortex-file-compressed	9983688	10341086	0.97
vortex_q01/duckdb:vortex-file-compressed	6078197	6212619	0.98

duckdb / parquet (0.995x ➖, 0↑ 0↓)

name	PR 21be72b (ns)	base 7cf53cb (ns)	ratio (PR/base)
vortex_q00/duckdb:parquet	23397273	23424912	1.00
vortex_q01/duckdb:parquet	9372319	9452056	0.99

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No file size changes detected.

[codspeed-hq]

Merging this PR will improve performance by 11.17%

⚡ 1 improved benchmark
✅ 1669 untouched benchmarks
⏩ 53 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	true_count_vortex_buffer[128]	580.6 ns	522.2 ns	+11.17%

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 rk/populatevalidate (21be72b) with develop (cc6803a)²}

Footnotes

1. 53 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. ↩

2. No successful run was found on develop (7cf53cb) during the generation of this report, so cc6803a was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩