Phillip Cloud commented on ARROW-2224:

The "should" here isn't related to linking issues, rather, it's related to 
performance. See here for some benchmarks: 

Those benchmarks are now coming up on 8 years old, so we should revisit that.

Some of the linking issues might be mitigated by using {{<regex>}} on Windows 
and {{regcomp}} on UNIX platforms. I'm unaware of the perils of that solution 
(if any).

> [C++] Replace boost regex usage with libre2
> -------------------------------------------
>                 Key: ARROW-2224
>                 URL: https://issues.apache.org/jira/browse/ARROW-2224
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Phillip Cloud
>            Assignee: Phillip Cloud
>            Priority: Major
> We're using {{boost::regex}} to parse decimal strings for {{decimal128}} 
> types. We should use {{libre2}} instead.

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