snippet.rb

require 'benchmark'

require 'rubygems'
require 'rest_client'

Benchmark.bm(25) do |x|

  etag = nil
  x.report("(freshen view, fetch etag)") do
    resp = RestClient.get "localhost:5984/gateway-development/_view/Image/all?include_docs=true&reduce=false"
    etag =  resp.headers[:etag]
  end

  x.report("couchdb") do
    1.times do |i|
      `curl "localhost:5984/gateway-development/_view/Image/all?include_docs=true&reduce=false" 2&> /dev/null`
    end
  end

  x.report("couchdb+etag") do
    1.times do |i|
      `curl -H 'If-None-Match: \"#{etag}\"'"localhost:5984/gateway-development/_view/Image/all?include_docs=true&reduce=false" 2&> /dev/null`
    end
  end

  x.report("merb") do
    1.times do |i|
      `curl "localhost:4000/images"  2&> /dev/null`
    end
  end
  
  
end

#                               user     system      total        real
#1st request                0.270000   0.140000   0.410000 (  1.265971)
#couchdb                    0.000000   0.010000   0.080000 (  1.192913)
#couchdb+etag               0.000000   0.000000   0.030000 (  0.030326)
#merb                       0.010000   0.010000   0.050000 (  1.442723)