Mailinglist Archive: opensuse-ruby (32 mails)

[Stephan Kulow <coolo@xxxxxxx>]

On 20.03.2012 14:17, Stephan Kulow wrote:
> On 20.03.2012 14:06, Josef Reidinger wrote:
> > On Tue, 20 Mar 2012 14:00:17 +0100
> > Stephan Kulow <coolo@xxxxxxx> wrote:
> >
> > > Hi,
> > >
> > > Now that I have the initial port of obs api to rails 3 finished, I
> > > consider staying forever on rails2 :)
> > >
> > > I have this little benchmark that I initially wrote to check if it's
> > > worth talking to the API in json instead of the usual XML:
> >
> > Usually using different xml implementation then rexml in rails help a lot.
> >
> > >     prjs = DbProject.find :all
> > >     x = Benchmark.realtime { prjs.each { |p| p.expand_flags.to_json } }
> > >     y = Benchmark.realtime { prjs.each { |p| p.to_axml('flagdetails') }
> > >     puts "#{x} #{y}"
> > >
> > > And indeed with rails 2.3.14, it shows json is good:
> > >   0.108472093 0.379935258
> > >
> > > But now with rails 3.2.1 both are slower ;(
> > >   0.515888469 1.334631859
> >
> > Interesting, I think this deserve investigation why it is.
> > Do you have identic scenario? Could you profile run?
> Between the runs I only switch branch, both are working against the same
> set of fixtures against the same database.
>
> Attached are two perftools pictures - the rails32 sample has 62% GC,
> which appears like madness to me.

As expected, a GC.disable before the test "improves" performance

GC.disable:
0.258863653 0.552205324

normal with GC
0.579500092 1.455681835

now on to C on rails :)

Greetings, Stephan

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