Ruby on Rails

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

>
> 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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