Ruby on Rails

On 2 January 2011 21:18, paul h <paul@hollyer.me.uk> wrote:
> Hi Colin,
>
> I have duplicated your tests using rvm on Ubuntu 10.04, with AMD64,
> and 3GB RAM, results are below:
>
> On Dec 30 2010, 3:59 pm, Colin Law <clan...@googlemail.com> wrote:
>> On 29 December 2010 23:18, Conrad Taylor <conra...@gmail.com> wrote:
>>
>> > ...
>> > Colin, do you have a sample application?  Next, it really depends
>> > on your overall system and Rails app configuration.  For example,
>> > if you don't have enough RAM, your system move data from memory
>> > to the disk and vice-versa.  This is a huge performance hit.  Can you
>> > provide more information?
>>
>> I have 1GByte RAM and while running the test it shows less than half
>> used and the disk is not rattling.  The processor shows 100%
>> utilisation whilst the test is running, with rake being the process
>> using most of it.
>>
>> I have tried making a new rails 3.0.3 app
>> rails new testruby
>> then using rvm to switch between 1.8.7 p302 and 1.9.2 p136
>>
>> On each ruby I ran
>> time rake db:migrate
>> a couple of times to let the disk cache settle out then for 1.8.7 I got
>> real    0m2.111s
>> user    0m1.804s
>> sys     0m0.220s
>
> real    0m2.520s
> user   0m2.100s
> sys    0m0.340s
>
>>
>> and on 1.9.2
>> real    0m4.098s
>> user    0m3.512s
>> sys     0m0.424s
>
> real    0m0.922s
> user   0m0.730s
> sys    0m0.150s

So you are getting 1.9.2 _faster_ than 1.8.7 for db:migrate?

>
>>
>> I also tried rake test and got, on 1.8.7
>
> I ran rake test and got no output, rake test:benchmark gave the
> following:
>
>> real    0m3.615s
>> user    0m3.104s
>> sys     0m0.316s
>
> Finished in 0.289591 seconds
>
>>
>> and on 1.9.2
>> real    0m6.487s
>> user    0m5.320s
>> sys     0m0.684s
>
> Finished in 0.578807 seconds
>
>>
>> It seems as if 1.9.2 takes about twice as long for some reason.
>>
>> Colin
>
> Paul
>
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