adding an atime test case; groupby with dogroups (R expression) #PR4558 #6287
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This test case discusses the issue reported on performing group computations, specifically when running R's C eval on each group (q7 and q8) in the db-benchmark, indicating a slowness in the implementation of the code. #4200
This is the #4558 that discusses the Cause of the Regression: #4200 (comment) which appears that the regression occurred during the evaluation of C code within these particular groups, indicating a performance issue or slowness in the implementation of the code.
The regression was fixed Regression by the addition of const int nth = getDTthreads