Frank Du created ARROW-9263:

             Summary: [C++] Benchmark: promote RegressionSetArgs size to L2
                 Key: ARROW-9263
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
            Reporter: Frank Du
            Assignee: Frank Du

The 0.01% null probability on L1 size(usually 32k) generate all true values for 
double/float type.

Large the size that it can produce the wanted 0.01% null data.


const int64_t array_size = args.size / sizeof(CType);

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