[Parquet] Alp criterion bench - #10662
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Refactor: Pull common header structures into common module
StreamingPage<F> encodes pages 2..N vector-by-vector as values arrive via put(), holding only a <1024 carry plus the compressed body instead of buffering the whole page. Page 1 still buffers to build the preset. Output is provably byte-identical to the buffered encoder (pinned by test_streaming_matches_buffered / test_streaming_irregular_puts). Adds an #[ignore]d rdtsc throughput bench (mod throughput) reporting cyc/val for encode buffered/streaming and decode. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Which issue does this PR close?
Closes [Parquet] Add Criterion benchmarks for ALP #10642 .
stacks on [Parquet] ALP encoder/decoder support #9372
Rationale for this change
We need a benchmark to measure performance and prove future optimizations
What changes are included in this PR?
Are these changes tested?
Are there any user-facing changes?