Regression of queries that project a large number of fields

XMLWordPrintableJSON

    • Query
    • ALL
    • Hide

      Linux ip-10-0-0-85 3.11.0-12-generic #19-Ubuntu SMP Wed Oct 9 16:20:46 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

      Show
      Linux ip-10-0-0-85 3.11.0-12-generic #19-Ubuntu SMP Wed Oct 9 16:20:46 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
    • None
    • 3
    • None
    • None
    • None
    • None
    • None
    • None
    • None

      Some of my benchmarks show the following (it happens both in the single and multi-threaded case scenario). When the number of fields to project is small the regression is not noticeable, I'll try to investigate a bit more on the root cause.
      Minimal test case attached.

      Master (as per today)

      connecting to: test
      9071
      8931
      8937
      8940
      8980
      

      2.4.9

      connecting to: test
      8183
      8065
      8097
      8165
      8081
      

        1. projection.js
          4 kB
        2. murmur_vs_oldhash.png
          murmur_vs_oldhash.png
          98 kB

              Assignee:
              Backlog - Query Team (Inactive)
              Reporter:
              Davide Italiano (Inactive)
              Votes:
              1 Vote for this issue
              Watchers:
              6 Start watching this issue

                Created:
                Updated:
                Resolved: