shubhamsrkdev commented on issue #15662:
URL: https://github.com/apache/lucene/issues/15662#issuecomment-3841482789

   Owing to this:
   
   >It is not possible to do a direct git bisect because of 
https://github.com/apache/lucene/pull/15295. Since lucene util also 
https://github.com/mikemccand/luceneutil/pull/510, so newer (present) lucene 
util is not compatible with pre CFS change and vice-versa.
   
   To test the [CFS code merge](https://github.com/apache/lucene/pull/15295), I 
removed the [CFS method calls from lucene 
utils](https://github.com/mikemccand/luceneutil/pull/510), and then ran 
benchmarks between the [pre 22/01 
commit](https://github.com/apache/lucene/commit/2f9aa8ae26d6c1087884c734e1b3d137bd8c6601)
 and [CFS 
one](https://github.com/apache/lucene/commit/6643a5dbe1ed6d3a4b933c90beed60cfe44b5992)
 It also shows no regressions. (I am not sure if this is the correct/best 
method to do this):
   
   ```
   
                               TaskQPS baseline      StdDevQPS 
my_modified_version      StdDev                Pct diff p-value
                    MedSloppyPhrase       45.23      (3.5%)       43.42      
(8.1%)   -4.0% ( -15% -    7%) 0.043
                      OrNotHighHigh      389.30      (4.4%)      377.75      
(4.8%)   -3.0% ( -11% -    6%) 0.041
                      OrHighNotHigh      603.76      (3.7%)      587.83      
(3.4%)   -2.6% (  -9% -    4%) 0.019
                           HighTerm      875.27      (4.2%)      854.98      
(7.0%)   -2.3% ( -13% -    9%) 0.207
                       OrNotHighLow     1404.62      (2.7%)     1375.72      
(2.8%)   -2.1% (  -7% -    3%) 0.018
                           Wildcard      228.83      (5.6%)      224.44      
(5.8%)   -1.9% ( -12% -   10%) 0.287
                             IntSet      807.93      (4.5%)      793.28      
(5.6%)   -1.8% ( -11% -    8%) 0.256
                    LowSloppyPhrase      116.93      (3.1%)      114.83      
(5.0%)   -1.8% (  -9% -    6%) 0.175
                       OrNotHighMed      727.53      (3.2%)      717.41      
(3.1%)   -1.4% (  -7% -    5%) 0.163
                       OrHighNotMed      702.45      (5.8%)      692.74      
(3.5%)   -1.4% ( -10% -    8%) 0.359
                         AndHighLow     1338.92      (2.3%)     1323.26      
(2.4%)   -1.2% (  -5% -    3%) 0.118
                            MedTerm     1137.56      (4.3%)     1125.17      
(4.5%)   -1.1% (  -9% -    7%) 0.431
                         HighPhrase      230.70      (1.7%)      228.29      
(2.1%)   -1.0% (  -4% -    2%) 0.083
               MedTermDayTaxoFacets       24.85      (1.3%)       24.64      
(1.4%)   -0.8% (  -3% -    1%) 0.055
                         TermDTSort      256.10      (3.8%)      254.16      
(3.3%)   -0.8% (  -7% -    6%) 0.501
             OrHighMedDayTaxoFacets       14.31      (2.4%)       14.21      
(1.9%)   -0.7% (  -4% -    3%) 0.275
                LowIntervalsOrdered      460.54      (5.5%)      457.14      
(5.9%)   -0.7% ( -11% -   11%) 0.682
                       OrHighNotLow      980.75      (5.8%)      974.07      
(3.8%)   -0.7% (  -9% -    9%) 0.661
                            Prefix3      733.46      (3.0%)      728.66      
(2.7%)   -0.7% (  -6% -    5%) 0.465
               HighIntervalsOrdered        5.96      (4.8%)        5.93      
(5.1%)   -0.6% ( -10% -    9%) 0.717
              BrowseMonthTaxoFacets        2.77      (0.9%)        2.76      
(2.7%)   -0.5% (  -4% -    3%) 0.460
                  HighTermTitleSort      148.59      (3.3%)      147.94      
(2.7%)   -0.4% (  -6% -    5%) 0.647
                   HighSloppyPhrase       89.69      (2.5%)       89.47      
(2.6%)   -0.2% (  -5% -    4%) 0.762
                          LowPhrase       62.31      (2.3%)       62.16      
(2.2%)   -0.2% (  -4% -    4%) 0.736
                          MedPhrase       67.23      (1.8%)       67.08      
(1.7%)   -0.2% (  -3% -    3%) 0.684
                MedIntervalsOrdered       61.13      (5.0%)       61.00      
(5.6%)   -0.2% ( -10% -   10%) 0.896
           AndHighHighDayTaxoFacets       37.95      (1.0%)       37.92      
(0.9%)   -0.1% (  -1% -    1%) 0.761
                             IntNRQ      480.95      (1.5%)      480.96      
(1.8%)    0.0% (  -3% -    3%) 0.997
                  HighTermMonthSort     1367.53      (2.9%)     1367.57      
(2.5%)    0.0% (  -5% -    5%) 0.997
                           PKLookup      200.22      (2.4%)      200.26      
(2.2%)    0.0% (  -4% -    4%) 0.980
            AndHighMedDayTaxoFacets       37.34      (1.3%)       37.35      
(1.3%)    0.0% (  -2% -    2%) 0.950
               BrowseDateSSDVFacets        0.89      (8.9%)        0.89      
(9.0%)    0.1% ( -16% -   19%) 0.986
        BrowseRandomLabelTaxoFacets        2.42      (6.7%)        2.42      
(6.3%)    0.1% ( -12% -   14%) 0.944
              HighTermDayOfYearSort      337.48      (1.4%)      337.97      
(2.4%)    0.1% (  -3% -    4%) 0.815
                          OrHighLow      858.90      (2.8%)      860.97      
(1.5%)    0.2% (  -3% -    4%) 0.733
                             Fuzzy2       62.96      (2.4%)       63.12      
(2.6%)    0.3% (  -4% -    5%) 0.751
               HighTermTitleBDVSort       59.22      (1.2%)       59.40      
(1.3%)    0.3% (  -2% -    2%) 0.424
        BrowseRandomLabelSSDVFacets        3.26     (12.3%)        3.28     
(11.0%)    0.4% ( -20% -   26%) 0.920
                             Fuzzy1       76.09      (2.4%)       76.38      
(2.8%)    0.4% (  -4% -    5%) 0.645
                        LowSpanNear       23.34      (1.6%)       23.44      
(1.1%)    0.4% (  -2% -    3%) 0.352
                        AndHighHigh      246.95      (4.4%)      247.99      
(2.6%)    0.4% (  -6% -    7%) 0.712
                            Respell       32.82      (1.7%)       32.96      
(1.9%)    0.4% (  -3% -    4%) 0.460
                         AndHighMed      779.67      (1.7%)      783.93      
(2.2%)    0.5% (  -3% -    4%) 0.378
                          OrHighMed      614.98      (4.2%)      618.45      
(1.8%)    0.6% (  -5% -    6%) 0.578
                        MedSpanNear       81.03      (2.1%)       81.50      
(1.3%)    0.6% (  -2% -    4%) 0.299
                       HighSpanNear       69.20      (2.8%)       69.71      
(2.2%)    0.7% (  -4% -    5%) 0.363
                              range     2080.15      (5.2%)     2100.67      
(5.0%)    1.0% (  -8% -   11%) 0.541
                            LowTerm     1783.95      (7.3%)     1802.69      
(3.8%)    1.1% (  -9% -   13%) 0.568
          BrowseDayOfYearTaxoFacets        3.23      (8.2%)        3.27     
(10.5%)    1.3% ( -15% -   21%) 0.651
               BrowseDateTaxoFacets        3.21      (8.4%)        3.26     
(11.3%)    1.4% ( -16% -   23%) 0.669
                         OrHighHigh      258.98      (5.9%)      263.06      
(3.7%)    1.6% (  -7% -   11%) 0.309
              BrowseMonthSSDVFacets        4.41      (6.5%)        4.56     
(13.1%)    3.2% ( -15% -   24%) 0.320
          BrowseDayOfYearSSDVFacets        4.37      (8.4%)        4.56     
(12.1%)    4.2% ( -15% -   26%) 0.201
   ```


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