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Posted to github@arrow.apache.org by "etseidl (via GitHub)" <gi...@apache.org> on 2026/02/25 06:14:25 UTC
[I] Speedup DELTA_BINARY_PACKED decoding when bitwidth is 0 [arrow-rs]
etseidl opened a new issue, #9476:
URL: https://github.com/apache/arrow-rs/issues/9476
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
In https://github.com/apache/arrow/pull/49296 @pitrou found a clever optimization for delta packed decoding. If the bitwidth for a miniblock is 0, meaning a constant delta throughout the miniblock, then some optimizations can be made. Some pretty dramatic speedups were presented for the arrow-cpp decoder.
**Describe the solution you'd like**
Explore implementing a similar optimization in the parquet crate.
**Describe alternatives you've considered**
Leave it as is
**Additional context**
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Re: [I] Speedup DELTA_BINARY_PACKED decoding when bitwidth is 0 [arrow-rs]
Posted by "alamb (via GitHub)" <gi...@apache.org>.
alamb closed issue #9476: Speedup DELTA_BINARY_PACKED decoding when bitwidth is 0
URL: https://github.com/apache/arrow-rs/issues/9476
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Re: [I] Speedup DELTA_BINARY_PACKED decoding when bitwidth is 0 [arrow-rs]
Posted by "alamb (via GitHub)" <gi...@apache.org>.
alamb commented on issue #9476:
URL: https://github.com/apache/arrow-rs/issues/9476#issuecomment-4084934900
`label_issue.py` automatically added labels {'parquet'} from #9500
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