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https://issues.apache.org/jira/browse/ARROW-3536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16667666#comment-16667666
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Antoine Pitrou commented on ARROW-3536:
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> Your fast ASCII approach, and it is indeed almost as fast as a version using
> vector instructions, is something I would qualify as being SWAR (SIMD Within
> A Register) so it is SIMD technically speaking
Indeed. But using standard C++ operators instead of clumsily-named intrinsics
is what makes it vastly more readable IMHO.
In other words, using a dedicated intrinsic-abstracting library (e.g. xsimd or
Vc) would probably help. It would also help portability.
> [C++] Fast UTF8 validation functions
> ------------------------------------
>
> Key: ARROW-3536
> URL: https://issues.apache.org/jira/browse/ARROW-3536
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Wes McKinney
> Priority: Major
> Fix For: 0.13.0
>
>
> [~lemire] discusses this topic in
> https://lemire.me/blog/2018/05/16/validating-utf-8-strings-using-as-little-as-0-7-cycles-per-byte/
> In Java there is also
> https://lemire.me/blog/2018/10/16/validating-utf-8-bytes-java-edition/
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