miloops

map <D-1> :tabn 1<CR>
map <D-2> :tabn 2<CR>
map <D-3> :tabn 3<CR>
map <D-4> :tabn 4<CR>
map <D-5> :tabn 5<CR>
map <D-6> :tabn 6<CR>
map <D-7> :tabn 7<CR>
map <D-8> :tabn 8<CR>
map <D-9> :tabn 9<CR>

miloops

~/Workspace/github/miloops/rails/activerecord(master) $ ruby examples/performance.rb 
Thread ID: 2148368700
Total: 3.848270

 %self     total     self     wait    child    calls  name
 15.08      0.89     0.58     0.00     0.31    20003  Array#each (ruby_runtime:0}
  7.03      3.77     0.27     0.00     3.50    10000  ActiveRecord::Base#initialize (./examples/../lib/active_record/base.rb:1430}
  4.83      0.92     0.19     0.00     0.80    20000  <Class::ActiveRecord::Base>#_initialize_superclass_callbacks (/Users/miloops/Workspace/github/miloops/rails/activesupport/lib/active_support/callbacks.rb:568}
  4.82      1.56     0.19     0.00     1.37    10000  ActiveRecord::Base#_run_initialize_callbacks (/Users/miloops/Workspace/github/miloops/rails/activesupport/lib/active_support/callbacks.rb:392}
  3.89      0.45     0.15     0.00     0.30    10000  <Class::ActiveRecord::Base>#scoped_methods (./examples/../lib/active_record/base.rb:1200}

miloops

diff --git a/lib/arel/engines/sql/relations/compiler.rb b/lib/arel/engines/sql/relations/compiler.rb
index 374967b..05a8f16 100644
--- a/lib/arel/engines/sql/relations/compiler.rb
+++ b/lib/arel/engines/sql/relations/compiler.rb
@@ -8,17 +8,28 @@ module Arel
       end
 
       def select_sql
-        query = build_query \
-          "SELECT     #{select_clauses.join(', ')}",

miloops

# using mysql gem
>> puts Benchmark.measure{10.times{ActiveRecord::Base.connection.execute("select * from registrations")}}
 1.860000   1.900000   3.760000 ( 25.765718)

# using mysql2 gem
>> puts Benchmark.measure{10.times{ActiveRecord::Base.connection.execute("select * from registrations")}}
 1.820000   1.850000   3.670000 ( 18.838711)

# looks really cool, but... we never do that kind of queries, let's get realistic

miloops

abstract (1.0.0)
actionmailer (3.0.0.rc)
actionpack (3.0.0.rc)
activemodel (3.0.0.rc)
activerecord (3.0.0.rc)
activeresource (3.0.0.rc)
activesupport (3.0.0.rc)
arel (0.4.0)
autotest (4.3.2)
autotest-fsevent (0.2.2)

miloops

set go-=T
set bg=dark
if &background == "dark"
       hi normal guibg=black
       set transp=8
endif
set wildmenu
set lines=120
set columns=130

miloops

-      options.assert_valid_keys(VALID_FIND_OPTIONS)
+      finders.assert_valid_keys(VALID_FIND_OPTIONS)
+      finders = options.dup
+      finders.delete_if { |key, value| value.nil? }
 
-      [:joins, :select, :group, :having, :limit, :offset, :from, :lock].each do |finder|
-        if value = options[finder]
-          relation = relation.send(finder, value)
-        end
-      end

miloops

  def debug
    p "=" * 100
    yield
    p "=" * 100
  end

miloops

rails/master

                                                       |      AR |
------------------------------------------------------------------
Model#id                                       x100000 |   0.967 |
Model.new (instantiation)                       x10000 |   0.324 |
Model.new (setting attributes)                  x10000 |   0.892 |
Model.first                                     x10000 |   4.504 |
Model.all limit(100)                             x1000 |  11.838 |
Model.all limit(100) with relationship           x1000 |  27.571 |

miloops

   def convert_to_png(src, out)
     system("gs -sDEVICE=ppmraw -r144x144 -sOutputFile=- -sNOPAUSE \
      -q #{src} -c showpage -c quit | pnmcrop | pnmmargin -white 10 | pnmtopng > #{out} 2> /dev/null")
   end