gistfile1.rb

require 'redis'
require 'hiredis'
require "redis/connection/hiredis"

total = 0

conn = Redis.new(db: 1, driver: :hiredis, path: '/tmp/redis.sock')

(1000...1100).each do |section|
  key = "section:#{section}"
  values = []
  (0...10).each do |i|
    (0...5).each do |j|
      (0...10).each do |k|
        (0...80).each do |l|
          values << [i, j, k, l].join(':')
        end
      end
    end

  total += conn.sadd(key, values)
  end
end

puts "Total: #{total}"

# ruby 2.0 
# no GC tuning: ruby r.rb  16.12s user 0.67s system 55% cpu 30.312 total
# GC tuning: RUBY_GC_MALLOC_LIMIT=90000000 ruby r.rb  15.41s user 0.63s system 59% cpu 27.132 total

gistfile2.rb

require 'redis'
require 'hiredis'
require "redis/connection/hiredis"

total = 0

conn = Redis.new(db: 1, driver: :hiredis, path: '/tmp/redis.sock')

(1000...1100).each do |section|
  key = "section:#{section}"
  values = Array.new(10 * 5 * 10 * 80)
  (0...10).each do |i|
    (0...5).each do |j|
      (0...10).each do |k|
        (0...80).each do |l|
          values << [i, j, k, l].join(':')
        end
      end
    end

  total += conn.sadd(key, values)
  end
end

puts "Total: #{total}"

# Ruby 2.0
# no GC tuning: ruby r.rb  32.29s user 1.21s system 51% cpu 1:05.55 total
# GC tuning: RUBY_GC_MALLOC_LIMIT=90000000 ruby r.rb  32.20s user 1.29s system 51% cpu 1:04.51 total

hiredis_only.rb

#require 'redis'
require 'hiredis'
#require "redis/connection/hiredis"

total = 0

#conn = Redis.new(db: 1, driver: :hiredis, path: '/tmp/redis.sock')
conn = Hiredis::Connection.new
conn.connect("127.0.0.1", 6379)

conn.write ["select", 1]
conn.read

(1000...1100).each do |section|
  key = "section:#{section}"
  values = []#Array.new(10 * 5 * 10 * 80)
  (0...10).each do |i|
    (0...5).each do |j|
      (0...10).each do |k|
        (0...80).each do |l|
          values << [i, j, k, l].join(':')
        end
      end
    end

  #total += conn.sadd(key, values)
  conn.write ["sadd", key, values]
  total += conn.read
  end
end

puts "Total: #{total}"
# No GC: ruby r.rb  13.72s user 0.34s system 52% cpu 26.928 total
# No GC, array preallocated: ruby hiredis_version.rb  27.18s user 0.54s system 46% cpu 1:00.11 total
# GC: RUBY_GC_MALLOC_LIMIT=90000000 ruby r.rb  13.72s user 0.33s system 51% cpu 27.079 total
# GC, array preallocated: RUBY_GC_MALLOC_LIMIT=90000000 ruby hiredis_version.rb  27.03s user 0.56s system 46% cpu 59.928 total