Antoine Pitrou commented on ARROW-2224:

Note that the day where we really care about decimal performance, we should 
probably use Stefan Krah's libmpdec, which is also used by the Python _decimal 
module. It's a pure C library, is fast and would probably allow us to have 
tighter interoperation with Python decimals.

> [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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