Rails - Jun 2005 - Profiling a complete request-response cycle? Automated performance tests?

I''d like to get an idea where time is spent in my application. Right
now
everything is fast enough, but I''d prefer to feel less blind and 
ignorant.

My general interest is to identify places where cycles are burned 
without good reason. More specifically, I''m curious how much time 
rendering of some views takes and how it compares to the time DB 
accesses take.

For this purpose I''d like to profile complete request-response cycles 
for several actions. Also, I''d like to have several automated 
performance tests to ensure that further changes don''t worsen response 
time compared to a set baseline.

Is anyone already doing these things and can provide some advise?

Michael

-- 
Michael Schuerig                 Nothing is as brilliantly adaptive
mailto:michael-q5aiKMLteq4b1SvskN2V4Q@public.gmane.org       as selective
stupidity.
http://www.schuerig.de/michael/    --A.O. Rorty, The Deceptive Self

On Wednesday 22 June 2005 02:14, Michael Schuerig wrote:
> My general interest is to identify places where cycles are burned
> without good reason. More specifically, I''m curious how much time
> rendering of some views takes and how it compares to the time DB
> accesses take.
It helps to look at the examples...

  actionpack/examples/benchmark.rb

When I run this with profiling enabled, though, the profiler crashes:

$ ruby benchmark.rb 1 true
  %   cumulative   self              self     total
 time   seconds   seconds    calls  ms/call  ms/call  name
4500.00     0.45      0.45        1   450.00   450.00  
Profiler__.start_profile
  0.00     0.45      0.00        1     0.00     0.00  Module#==  0.00     0.45  
0.00        1     0.00     0.00  Object#require
  0.00     0.45      0.00        1     0.00    10.00  #toplevel
  0.00     0.45      0.00        1     0.00   450.00  Kernel.require
/usr/lib/ruby/1.8/profiler.rb:27: undefined method `[]'' for
nil:NilClass
(NoMethodError)
        from /usr/lib/ruby/1.8/profiler.rb:5:in `require''
        
from ./../lib/../../activesupport/lib/active_support/dependencies.rb:202:in 
`require''
        from benchmark.rb:33


Michael

-- 
Michael Schuerig                       Face reality and stare it down
mailto:michael-q5aiKMLteq4b1SvskN2V4Q@public.gmane.org        --Jethro Tull,
Silver River Turning
http://www.schuerig.de/michael/