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[C++][Parquet] Better simd unpack algorithm #48277
Description
Describe the enhancement requested
The current algorithm unpack algorithm in the bpacking files do not fully leverage SIMD operations and perform poorly on SSE4.2 (in fact they are not built for that reason).
They are also not available for multiple sizes.
We can take inspiration from
- http://arxiv.org/abs/1209.2137
- https://github.com/fast-pack/LittleIntPacker/blob/master/src/horizontalpacking32.c
Component(s)
C++, Parquet
Activity
GH-48277: [C++][Parquet] unpack with shuffle algorithm (#47994)
pitrou commentedon Feb 26, 2026
Issue resolved by pull request 47994
#47994
apacheGH-48277: [C++][Parquet] unpack with shuffle algorithm (apache#…
apacheGH-48277: [C++][Parquet] unpack with shuffle algorithm (apache#…