redis_memory_test example for key length comparision

redis_memory_test.rb

def redis_memory_test
    results = {}
    
    redis = Redis.new
    redis.flushdb
    results[:clear] = redis.info(:memory)['used_memory'].to_i
    
    (2..128).each do |i|
      redis.pipelined do
        10000.times { redis.incr( SecureRandom.urlsafe_base64( i  ) ) }
      end
      results[i+1] = ((redis.info(:memory)['used_memory'].to_i - results[:clear]).to_f/1.megabyte).round(2)
      redis.flushdb
    end
    
    # you need awesome-print gem to do this: 
    ap results
  end

# some results:
#  :clear => 724456,
#          3 => 0.55,
#          4 => 0.65,
#          5 => 0.58,
#          6 => 0.58,
#          7 => 0.74,
#             ...
#          14 => 0.74,
#          15 => 0.8,
#          16 => 0.8,
#          17 => 0.8,
#          18 => 0.8,
#          19 => 0.95,
#          20 => 0.89,
              ...
#          30 => 0.89,