read_cache_of_memcached.rb

gistfile1.rb

require 'dalli'
require 'active_support'
require 'active_support/cache/dalli_store'

CACHE = ::ActiveSupport::Cache::DalliStore.new 'localhost', namespace: 'demo'

n = 10000
n.times {|i| CACHE.write "user:#{i}:counter", i * i }

def read_in_batch(total, batch_size)
  (1..total).each_slice(batch_size) do |slice| 
    batch = slice.map { |i| "user:#{i}:counter" }
    CACHE.read_multi(*batch)
  end 
end

Benchmark.bmbm do |x|
  x.report "1-1" do
    n.times do |i| 
      CACHE.read "user:#{i}:counter"
    end
  end
  
  x.report "2-1" do
    read_in_batch n, 1
  end 

  x.report " 10" do
    read_in_batch n, 10
  end

  x.report " 30" do
    read_in_batch n, 30
  end  

  x.report " 50" do
    read_in_batch n, 50
  end

  x.report "100" do
    read_in_batch n, 100
  end  
end