Groovy Timer and Performance Got a call from my good friend of mine mentioning groovy is slow in computation. Well, I had to agree with him that groovy might be slower than plain old Java classes. But i'm sure that will improve over time.

Our conversation start with him creating a simple script which loop 100,000 times performing simple mulitplication. He uses Linux for this test and it takes him around 2 min. I was surprise! Thus I did my own performance test with the follow script (Using tips from Groovy's Project Manager blog, Timing a closure in Groovy :D)

timer = { closure ->
 start = System.currentTimeMillis()
 closure.call()
 println System.currentTimeMillis() - start
}

// define an array with value 1 to 100000
def rates = 1..100000

println 'Performing 1st Test with .times'
timer {
 def a = 10
 def b = 2
 100000.times {idx-> a*rates[idx] }
}

println 'Performing 2nd test with for'
timer {
 def a = 10
 def b = 2
 for(int i=0;i<100000;i++) {
  a*rates[i]
 }
}

For the 1st test, it took 187ms on my window machine and 2nd test took 62ms. Phew... Anyway we are going to exchange information on our finding.

Labels: Groovy

  ¶ 5:54 PM