discourse/script/bench.rb

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Ruby
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require "socket"
require "csv"
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require "yaml"
@timings = {}
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def run(command)
system(command, out: $stdout, err: :out)
end
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def measure(name)
start = Time.now
yield
@timings[name] = ((Time.now - start) * 1000).to_i
end
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def prereqs
puts "Be sure to following packages are installed:
sudo tasksel install postgresql-server
sudo apt-get -y install build-essential libssl-dev libyaml-dev git libtool libxslt-dev libxml2-dev libpq-dev gawk curl pngcrush python-software-properties
sudo apt-add-repository -y ppa:rwky/redis
sudo apt-get update
sudo apt-get install redis-server
"
end
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puts "Running bundle"
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if !run("bundle")
puts "Quitting, some of the gems did not install"
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prereqs
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exit
end
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puts "Ensuring config is setup"
unless %x{which ab > /dev/null 2>&1}
abort "Apache Bench is not installed. Try: apt-get install apache2-utils or brew install ab"
end
unless File.exists?("config/database.yml")
puts "Copying database.yml.development.sample to database.yml"
`cp config/database.yml.development-sample config/database.yml`
end
unless File.exists?("config/redis.yml")
puts "Copying redis.yml.sample to redis.yml"
`cp config/redis.yml.sample config/redis.yml`
end
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# Github settings
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ENV["RAILS_ENV"] = "profile"
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ENV["RUBY_GC_MALLOC_LIMIT"] = "1000000000"
ENV["RUBY_HEAP_SLOTS_GROWTH_FACTOR"] = "1.25"
ENV["RUBY_HEAP_MIN_SLOTS"] = "800000"
ENV["RUBY_FREE_MIN"] = "600000"
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def port_available? port
server = TCPServer.open port
server.close
true
rescue Errno::EADDRINUSE
false
end
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@port = 60079
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while !port_available? @port
@port += 1
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end
puts "Ensuring profiling DB exists and is migrated"
puts `bundle exec rake db:create`
`bundle exec rake db:migrate`
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puts "Timing loading Rails"
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measure("load_rails") do
`bundle exec rake middleware`
end
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puts "Populating Profile DB"
run("bundle exec ruby script/profile_db_generator.rb")
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def bench(path)
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puts "Running apache bench warmup"
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`ab -n 100 http://localhost:#{@port}#{path}`
puts "Benchmarking #{path}"
`ab -n 100 -e tmp/ab.csv http://localhost:#{@port}#{path}`
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percentiles = Hash[*[50, 75, 90, 99].zip([]).flatten]
CSV.foreach("tmp/ab.csv") do |percent, time|
percentiles[percent.to_i] = time.to_i if percentiles.key? percent.to_i
end
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percentiles
end
begin
pid = spawn("bundle exec thin start -p #{@port}")
while port_available? @port
sleep 1
end
home_page = bench("/")
topic_page = bench("/t/oh-how-i-wish-i-could-shut-up-like-a-tunnel-for-so/69")
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puts "Your Results: (note for timings- percentile is first, duration is second in millisecs)"
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puts({
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"home_page" => home_page,
"topic_page" => topic_page,
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"timings" => @timings,
"ruby-version" => "#{RUBY_VERSION}-p#{RUBY_PATCHLEVEL}",
"rails4?" => ENV["RAILS4"] == "1"
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}.to_yaml)
ensure
Process.kill "KILL", pid
end