Performance regression in bestbuy_agg_merge_same_db after introduction of WT-7872

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    • Storage Engines - 2022-07-11
    • 8

      BF ticket: https://jira.mongodb.org/browse/BF-24265

      The introduction of WT-7872 results in a 20% performance decrease in mongo test bestbuy_agg_merge_same_db, specifically the merge_into_bestbuy.target_identical_distribution_merge_insert_1_1 stat. Reverting WT-7872 returns performance back to its original values.

      Definition of Done:
      Investigate the cause of this regression and determine the correction. 
      After correcting target_identical_distribution_merge_insert_1_1 is back at it's pre-7872 performance.

              Assignee:
              Ravi Giri
              Reporter:
              Andrew Morton
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