Re: [PR] GH-39439 [C++][Gandiva] Add regexp_like [arrow]

["pitrou (via GitHub)" <gi...@apache.org>]

pitrou commented on PR #39441:
URL: https://github.com/apache/arrow/pull/39441#issuecomment-1967099040

   > Despite belonging to the latter group, these functions still undergo JIT compilation before they can be utilized.
   
   Right. But that function just calls into `re2`, and `re2` won't be JIT-compiled (i.e. the code won't be specialized for the particular regular expression). You're just JIT-compiling the stub, not the actual workhorse.
   
   That said, I don't object this either if this makes Gandiva somehow easier to use. It's just that using Gandiva for regular expression matching will not bring any performance improvements over calling `re2` directly (for example using https://arrow.apache.org/docs/cpp/compute.html#containment-tests).


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