Issue260 diff performance

[genadyp]

connected to #260

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Tests ContentData specifications: basic ContentData methods on 350_000 instances

• finish in less then within 5 minutes
• consume less then 250 MB

NOTE the results are not exact cause they do not run in a clean environment and influenced from monitoring/testing code, but they give a good approximation Supposition: monitoring code penalty is insignificant against time/memory usage of the tested code

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Was found that ConntentData cloning is extremely expensive operation

Init one object 350000 instances in less then 300 seconds: finished in 5 seconds Init one object clone of 350000 in less then 300 seconds: finished in 59 seconds Init more then one object two object of 350000 instances each in less then 600 seconds: finished in 9 seconds Init more then one object three object of 350000 instances each in less then 900 seconds: finished in 15 seconds Init more then one object three object of 350000 instances each in less then 900 seconds: finished in 15 seconds

then minus of two ContentData objects was re-written without using cloning

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Was found that performance of Ruby2.1.1 is much better than Ruby1.9.3

$ rvm current ruby-1.9.3-p327 $ rspec -fd spec/content_data/content_data_performance_spec.rb ..... minus of two objects with 350000 instances each finish in less then 300 seconds: do not finished in 300 seconds

$ rvm current ruby-2.1.1 $ rspec -fd spec/content_data/content_data_performance_spec.rb ...... minus of two objects with 350000 instances each finish in less then 300 seconds: finished in 25 seconds

Then it is highly recommended to move to Ruby2.1.1 With Ruby1.9.3 we still remain above 10 minutes for minus operation

[genadyp]

Yes, rspec is running now with tag command line parameter that determine whether to run performance specs.

Performance tests tagged with ':tag => true' tag.