jonkeane edited a comment on pull request #11225:
URL: https://github.com/apache/arrow/pull/11225#issuecomment-928256318
Ok, I've finally had a chance to run these. The results for strings are
super impressive. The difference was so much I had to widen some of these plots
to even see the difference between no altrep and altrep versions.
~Interestingly(?) it looks like dictionaries are also using altrep too
(though there doesn't seem to be any performance difference between them).~ I
should have refreshed this page before posting, you noted that structs can now
be altrep up above (sorry about that!). I'm not seeing a huge performance
increase with them though. _Note_ the @HEAD and @7f7f72d branches did not
return successfully not because there was a failure, but because the objects
didn't pass [the altrep checking that {arrowbench}
does](https://github.com/ursacomputing/arrowbench/blob/main/R/bm-array-to-vector.R#L67-L76).
[altvec-with-strings.html.zip](https://github.com/apache/arrow/files/7239176/altvec-with-strings.html.zip)
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