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https://issues.apache.org/jira/browse/PARQUET-1841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17087475#comment-17087475
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Frank Du commented on PARQUET-1841:
-----------------------------------
I wrote a draft implementation for AVX512 int32_t/int64_t path using
mask_expand_32/mask_expand_64, seems it's working as it pass all exited test
units. But I don't find one bench-marking which based on the decode spaced API,
can you point me? And I will work on the SSE part then.
> [C++] Experiment to see if using SIMD shuffle operations for DecodeSpaced
> improves performance
> ----------------------------------------------------------------------------------------------
>
> Key: PARQUET-1841
> URL: https://issues.apache.org/jira/browse/PARQUET-1841
> Project: Parquet
> Issue Type: Improvement
> Components: parquet-cpp
> Reporter: Micah Kornfield
> Assignee: Micah Kornfield
> Priority: Major
> Attachments: image-2020-04-14-15-01-48-222.png
>
>
> Followup from PARQUET-1840 for current benchmarks it seems that doing
> removing the memset somehow either has no impact or is slightly worse. We
> should investigate using SIMD operations to speed up spacing.
>
> As part of this we can see if moving the memset to only cover uninitialized
> values after moving all required values provides any speedup.
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