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string_interpolation_3.rb

module Memcache
  KEY_HASH = YAML.load_file(File.join(Rails.root, 'config', 'memcached_keys.yml')).symbolize_keys!
	
  def self.key(key, value)
    “#{KEY_HASH[key]}:#{value}”
  end

  def self.multi_key(key, value1, value2)
    “#{KEY_HASH[key]}:#{value1}:#{value2}”
  end
end

Memcache::TENANT_BY_ID = "TENANT_BY_ID:%{tenant_id}"

Benchmark.bmbm { |x|
 x.report(‘existing’) {
  1000.times do |n|
   1000.times { 
    Memcache::TENANT_BY_ID % { tenant_id: n }
   }
  end
 }
 x.report(‘new’) {
  1000.times do |n|
   1000.times { 
    Memcache.key(:tenant_by_id, n)
   }
  end
 }
}