Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
Script used to benchmark Valium
============================================================
Benchmarking with Ruby 1.9.3 and ActiveRecord 3.2.0.beta
============================================================
user system total real
============================================================
RSS : 31432k (31432k)
Objects : 102195 (102195)
============================================================
SINGLE-VALUE TEST
============================================================
map 23.440000 0.060000 23.500000 ( 23.567513)
============================================================
RSS : 33392k (1960k)
Objects : 102195 (0)
============================================================
valium 2.720000 0.010000 2.730000 ( 2.737492)
============================================================
RSS : 33392k (0k)
Objects : 102195 (0)
============================================================
MULTI-VALUE TEST
============================================================
map 27.560000 0.090000 27.650000 ( 27.721982)
============================================================
RSS : 33392k (0k)
Objects : 102195 (0)
============================================================
valium 5.340000 0.010000 5.350000 ( 5.370545)
============================================================
RSS : 33392k (0k)
Objects : 102195 (0)
============================================================
MULTI-VALUE TEST WITH SERIALIZATION
============================================================
map 125.190000 8.630000 133.820000 (134.364609)
============================================================
RSS : 64752k (31360k)
Objects : 102195 (0)
============================================================
valium 87.010000 4.940000 91.950000 ( 92.223318)
============================================================
RSS : 85180k (20428k)
Objects : 102195 (0)
============================================================
#!/usr/bin/env ruby
#
# Benchmarking script for Valium (http://github.com/ernie/valium)
require 'benchmark'
require 'valium'
puts '=' * 60 + "\n"
puts "Benchmarking with Ruby #{RUBY_VERSION} and ActiveRecord #{ActiveRecord::VERSION::STRING}\n"
puts '=' * 60 + "\n"
class Person < ActiveRecord::Base
serialize :extra_info
end
def display_mem_stats
@prev_rss = @current_rss || 0
@current_rss = `ps -o rss= -p #{$$}`.to_i
@prev_obj_count = @current_obj_count || 0
@current_obj_count = ObjectSpace.count_objects[:TOTAL]
puts "=" * 60
puts "RSS : #{@current_rss}k (#{@current_rss - @prev_rss}k)"
puts "Objects : #{@current_obj_count} (#{@current_obj_count - @prev_obj_count})"
puts "=" * 60
end
def verify_equality(first, second)
unless first == second
raise "Comparing apples to oranges, are we?"
end
end
def setup_database
ActiveRecord::Base.establish_connection(
:adapter => 'sqlite3',
:database => ':memory:',
)
ActiveRecord::Base.silence do
ActiveRecord::Migration.verbose = false
ActiveRecord::Schema.define do
create_table :people, :force => true do |t|
t.string :first_name
t.string :last_name
t.integer :age
t.text :extra_info
t.timestamps
end
end
end
1.upto(1000) do |num|
Person.create! :first_name => "Person", :last_name => "Number#{num}", :age => num % 99,
:extra_info => {:a_key => "Value Number #{num}"}
end
end
setup_database
Benchmark.bm(7) do |x|
display_mem_stats
if !ARGV[0] || ARGV[0] == 'single'
puts "\nSINGLE-VALUE TEST\n#{'=' * 60}"
verify_equality Person.select('id').map(&:id),
Person[:id]
x.report("map") do
1000.times do
Person.select('id').map(&:id)
end
end
display_mem_stats
x.report("valium") do
1000.times do
Person[:id]
end
end
display_mem_stats
end
if !ARGV[0] || ARGV[0] == 'multiple'
puts "\nMULTI-VALUE TEST\n#{'=' * 60}"
verify_equality Person.select('last_name, age').map {|p| [p.last_name, p.age]},
Person[:last_name, :age]
x.report("map") do
1000.times do
Person.select('last_name, age').map {|p| [p.last_name, p.age]}
end
end
display_mem_stats
x.report("valium") do
1000.times do
Person[:last_name, :age]
end
end
display_mem_stats
end
if !ARGV[0] || ARGV[0] == 'serialize'
puts "\nMULTI-VALUE TEST WITH SERIALIZATION\n#{'=' * 60}"
verify_equality Person.select('last_name, age, extra_info').map {|p| [p.last_name, p.age, p.extra_info]},
Person[:last_name, :age, :extra_info]
x.report("map") do
1000.times do
Person.select('last_name, age, extra_info').map {|p| [p.last_name, p.age, p.extra_info]}
end
end
display_mem_stats
x.report("valium") do
1000.times do
Person[:last_name, :age, :extra_info]
end
end
display_mem_stats
end
end
@mperham
Copy link

mperham commented Sep 8, 2011

Why aren't you disabling GC? The AR instances can be GC'd during the test and so the RSS numbers wouldn't actually reflect reality.

@ernie
Copy link
Author

ernie commented Sep 8, 2011

I ran it both ways, initially with GC disabled (though I had to reduce iterations to run without killing the system). It drastically increased Valium's lead, as you might expect.

In the end, though, we run apps with GC enabled. I decided that "reality" is to run the bench with GC enabled, as well.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment