Redis incr benchmark / text vs hash

benchmark.rb

require "benchmark"
require "redis"

redis = Redis.new(host: '127.0.0.1', port: 6379)

Benchmark.bm(10) do |x|
  x.report("text type:") {
    50000.times do |i|
      redis.set  "key#{i}", 0
      redis.incr "key#{i}"
      redis.decr "key#{i}"
    end

    print redis.info["used_memory_human"]
    redis.flushdb
  }

  x.report("hash type:") {
    50000.times do |i|
      redis.hset    "key", i, 0
      redis.hincrby "key", i, 1
      redis.hincrby "key", i, -1
    end

    print redis.info["used_memory_human"]
    redis.flushdb
  }
end

gistfile1.txt

$ ruby benchmark.rb
                 user     system      total        real
text type: 4.43M  4.170000   2.570000   6.740000 ( 12.598659)
hash type: 3.53M  5.000000   2.870000   7.870000 ( 14.536784)