Maarten Breddels created ARROW-10556:
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Summary: [C++] Caching pre computed data based on FunctionOptions
in the kernel state
Key: ARROW-10556
URL: https://issues.apache.org/jira/browse/ARROW-10556
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: Maarten Breddels
See discussion here:
[https://github.com/apache/arrow/pull/8621#issuecomment-724796243]
A kernel might need to pre-compute something based on the function options
passed. Since the Kernel-FunctionOptions mapping is not 1-to-1, it does not
make sense to store this in the function option object.
Currently, match_substring calculates a `prefix_table` on each Exec call. In
trim ([https://github.com/apache/arrow/pull/8621)] we compute a vector<bool> on
each Exec call. This should be done only once and cached in the kernel state
instead.
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