Benchmark Results

n = 50000
Rehearsal ----------------------------------------------
vanilla      2.980000   0.940000   3.920000 (  4.703619)
pipelined    0.820000   0.160000   0.980000 (  0.976310)
hmapped      0.160000   0.000000   0.160000 (  0.228029)
------------------------------------- total: 5.060000sec

                 user     system      total        real
vanilla      3.000000   0.940000   3.940000 (  4.718813)
pipelined    0.800000   0.140000   0.940000 (  0.945136)
hmapped      0.110000   0.000000   0.110000 (  0.172675)

redis_hash_bench.rb

require 'redis'
require 'benchmark'
require 'securerandom'
require 'uuid'

n = 50_000

REDIS = Redis.new
KEY = 'BENCHMARK'

puts "n = #{n}"

uuids = (1..n).to_a.map { UUID.generate }
bytes = (1..n).to_a.map { SecureRandom.hex }
pairs = uuids.zip(bytes)
hash = Hash[pairs]

Benchmark.bmbm(10) do |x|
  REDIS.del(KEY)

  x.report('vanilla') do
    pairs.each do |key, val|
      REDIS.hset(KEY, key, val)
    end
  end

  REDIS.del(KEY)

  x.report('pipelined') do
    REDIS.pipelined do
      pairs.each do |key, val|
        REDIS.hset(KEY, key, val)
      end
    end
  end

  REDIS.del(KEY)

  x.report('hmapped') do
    REDIS.mapped_hmset(KEY, hash)
  end
end