[jira] [Assigned] (ARROW-16014) [C++] Create more benchmarks for measuring expression evaluation overhead

["Weston Pace (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-16014?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Weston Pace reassigned ARROW-16014:
-----------------------------------

    Assignee: Sanjiban Sengupta  (was: Weston Pace)

> [C++] Create more benchmarks for measuring expression evaluation overhead
> -------------------------------------------------------------------------
>
>                 Key: ARROW-16014
>                 URL: https://issues.apache.org/jira/browse/ARROW-16014
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Weston Pace
>            Assignee: Sanjiban Sengupta
>            Priority: Major
>
> We have a lot of great benchmarks on individual kernels but I don't know if we have enough benchmarks on the function & expression evaluation itself.
> There are some benchmarks (function_benchmark.cc) which measure this but I would like to get a better sense of a "bytes per second" number from the function system for a trivial function (e.g. an identity function that simply returns the values as is).
> In addition, we should measure overhead for common tasks like preallocation, etc.
> I would also like these benchmarks to be parameterized by batch size.  Being able to run on small batches enables (in theory) better cache utilization.  I suspect that the overhead here may start to become a bottleneck.



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