Parallel GETs (throttle test)

import static groovyx.gpars.GParsPool.withPool as parallel

def list = ['http://google.com','http://bing.com','http://dogpile.com','http://ask.com','http://hbsecurity.com']

int maxThreads = list.size()
Range range = list.size()+1..1 // +1 for warmup round
boolean randomizeUrl = true

Long ts // start time for each thread size

println "WARMUP " + "*" * 40
(range).each { throttle ->
ts = Calendar.instance.timeInMillis

parallel( Math.min(maxThreads, throttle) ) { // restrict the thread pool size
list.eachParallel {
Long t = Calendar.instance.timeInMillis
if (randomizeUrl) it += "/?" + Math.random()*10
it.toURL().text // blockin call

println Thread.currentThread().toString() + 
" [$it] DONE >> seconds: " + ((Calendar.instance.timeInMillis - t)  /1000)
}
}

println "total time: " + ((Calendar.instance.timeInMillis - ts) / 1000)
println "*" * 40
}
println "==DONE=="

source: (here)