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  1. Mongoid
  2. MONGOID-3718

Slow inserts with mongoid 4?

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    Details

    • Type: Task
    • Status: Closed
    • Resolution: Done
    • Affects Version/s: None
    • Fix Version/s: 12_01_17
    • Component/s: None
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      Description

      Hello

      I'm having trouble with new version of mongoid. So far I've been running version 3.1.6, after upgrading to 4.0.0 I noticed drastically performance reduction.

      Please take a look at this very simple benchmark:

       ruby
      require "mongoid"
      require "benchmark"
       
      Mongoid.connect_to("benchmark")
      Mongoid.purge!
       
      class TestDoc
        include Mongoid::Document
        field :field_name_1
        field :field_name_2
        field :field_name_3
      end
       
      Benchmark.bm do |x|
        x.report("insert") do
          100_000.times { |i| TestDoc.create(field_name_1: i, field_name_2: "field name 2", field_name_3: "field name 3") }
        end
      end
      

      This thing runs on mongoid 4.0.0 over 3 times slower when compared to 3.1.6 - my question is this code somehow flawed (am I missing something obvious here?) or should I go :dancer: with ruby-prof and look for a cause? I tried mongoid 4.0.0 rc1 and rc2 - the results are even worse.

      Ruby / mongodb / cpu / os:

      ruby 2.1.0p0 (2013-12-25 revision 44422) [x86_64-linux]
      mongod 2.6.3
      Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz
      Linux 3.11.0-15-generic MONGOID-26-Ubuntu SMP x86_64 GNU/Linux
      

      Any insight is greatly appreciated, cheers :wink:

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            Assignee:
            Unassigned Unassigned
            Reporter:
            emq emq
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