[jira] [Created] (ARROW-9115) [C++] Process data buffers in batch in ascii_lower / ascii_upper kernels rather than using string_view value iteration

[Wes McKinney (Jira)]

Wes McKinney created ARROW-9115:
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             Summary: [C++] Process data buffers in batch in ascii_lower / 
ascii_upper kernels rather than using string_view value iteration
                 Key: ARROW-9115
                 URL: https://issues.apache.org/jira/browse/ARROW-9115
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
            Reporter: Wes McKinney
            Assignee: Wes McKinney
             Fix For: 1.0.0


Also add a benchmark



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