[jira] [Created] (ARROW-4504) [C++] Reduce the number of unit test executables

["Wes McKinney (JIRA)" <ji...@apache.org>]

Wes McKinney created ARROW-4504:
-----------------------------------

             Summary: [C++] Reduce the number of unit test executables
                 Key: ARROW-4504
                 URL: https://issues.apache.org/jira/browse/ARROW-4504
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
            Reporter: Wes McKinney
             Fix For: 0.13.0


Link times are a significant drag in MSVC builds. They don't affect Linux nearly as much when building with Ninja. I suggest we combine some of the fast-running tests within logical units to see if we can cut down from 106 test executables to 70 or so

{code}
100% tests passed, 0 tests failed out of 107
Label Time Summary:
arrow-tests           =  21.19 sec*proc (48 tests)
arrow_python-tests    =   0.26 sec*proc (1 test)
example               =   0.05 sec*proc (1 test)
gandiva-tests         =  11.65 sec*proc (39 tests)
parquet-tests         =  35.81 sec*proc (18 tests)
unittest              =  68.92 sec*proc (106 tests)
{code}



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