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bts_flight/v0.2/summary.md
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# BTS flight Parquet → Acta benchmark
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> Generated by examples/parquet_to_acta.rs; recorded 2026-08-11.
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## Dataset
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| Property | Value |
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| --- | ---: |
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| Source | U.S. BTS Reporting Carrier On-Time Performance |
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| Rows | 15,750,000 |
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| Columns | 51 |
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| Parquet row groups | 173 |
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| Parquet bytes | 381,644,436 |
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| Parquet SHA-256 | 33c7d1fd28faa95d002e05ebf778e6345c4eb1c9d39416224ee08967bad23f27 |
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## Conversion
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| Metric | Result |
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| --- | ---: |
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| Acta bytes | 325,340,952 |
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| Acta SHA-256 | ee5c07e11197665895065d3b998f30d2a3984bd6920e9121d04db67e55821d29 |
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| Acta blocks | 241 |
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| Parquet batches | 241 |
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| Acta / Parquet size ratio | 0.852× |
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| Size change | 14.753% smaller |
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| Elapsed time | 129.824 s |
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| Input throughput | 2.80 MiB/s |
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| Row throughput | 121,318 rows/s |
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The run used release mode, 65,536-row Parquet batches, 65,536-row Acta row
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blocks, adaptive encoding, and Zstandard level 6. The timer includes decode,
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type-checked conversion, compression, writing, and finish; it excludes
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compilation, dataset download, and the initial Parquet metadata/schema mapping.
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## Validation
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Full Acta validation decoded all 241 data blocks:
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~~~text
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format=(0, 2), frames=242, rows=15750000, incomplete_tail=false
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~~~
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This is one local Apple Silicon run with Rust 1.93.0 / Cargo 1.93.0 on
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aarch64-apple-darwin and 8 logical CPUs. Re-run the commands in the adjacent
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[benchmark README](../README.md) to reproduce the dataset, output checksum,
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and measurement.
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