luaScriptTest.scala

describe("lua script") {
      it("will be expected to work fast with smembers command execution") {

        val REDIS_HOST: String = "localhost"
        val REDIS_PORT: Int = 6379
        val DATABASE: Int = 2

        lazy val client = new RedisClient(REDIS_HOST, REDIS_PORT, DATABASE)

        val testKey = "test_key"
        //|return 1.0
        val loopSmembersCode = s"""
          |for k=1,1000 do
          |  local res = redis.call('SMEMBERS', "${testKey}")
          |end
          """.stripMargin
        val loopSmembersSHAHash = client.scriptLoad(loopSmembersCode).get

        def execTime[R](str: String)(proc: => R): R = {
          val start = System.nanoTime()
          val result = proc
          val end = System.nanoTime()
          val time = (end - start) / 1000000D
          println(s"execution time of ${str}: ${time} [ms]")
          result
        }

        (1 to 1000).foreach(id => client.sadd(testKey, id))

        import scala.sys.process._
        execTime(s"1000 loop smembers with 1000 members(eval)") {
          (1 to 1000).foreach(id => """redis-cli -n 2 EVAL "return redis.call('SMEMBERS','test_key')" 0""" !! )
        }

        execTime(s"1000 loop smembers with 1000 members(scala-redis evalBulk)") {
          client.evalBulk(loopSmembersCode, List(), List())
        }

        execTime(s"1000 loop smembers with 1000 members(scala-redis evalSHA)") {
          client.evalSHA(loopSmembersSHAHash, List(), List())
        }

        execTime(s"1000 loop smembers with 1000 members(scala-redis smembers)") {
          (1 to 1000).foreach(id => client.smembers(testKey))
        }

        client.del(testKey)

      }
}

result.txt

execution time of 1000 loop smembers with 1000 members(eval): 76349.003494 [ms]
execution time of 1000 loop smembers with 1000 members(scala-redis evalBulk): 7120.779401 [ms]
execution time of 1000 loop smembers with 1000 members(scala-redis evalSHA): 7001.60564 [ms]
execution time of 1000 loop smembers with 1000 members(scala-redis smembers): 2139.525746 [ms]