Wes McKinney created ARROW-17259:
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Summary: [C++] Use shared_ptr<DataType> less throughout
arrow/compute
Key: ARROW-17259
URL: https://issues.apache.org/jira/browse/ARROW-17259
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: Wes McKinney
Fix For: 10.0.0
It turns out we generate a ton of code just copying and manipulating
{{shared_ptr<DataType>}} throughput arrow/compute, and especially in the
configuration of the function/kernels registry. One function
{{RegisterScalarArithmetic}} generates around 300kb of code, which on looking
at disassembly contains a significant amount of inlined shared_ptr template
code. I made an attempt to refactoring things to use {{const DataType*}} for
function signatures which removes quite a bit of code bloat, and puts us on a
path to using fewer shared_ptr's in general
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