loop_performance.groovy

def lines = (1..10000000)

println lines.getClass()


// with list.each {}
def start = System.nanoTime()
lines.each { line->
    line++;
}
println ((System.nanoTime() - start) / 1_000_000_000)


// with loop over list
start = System.nanoTime()
for (line in lines){
    line++;
}
println ((System.nanoTime() - start) / 1_000_000_000)


// fastest loop
start = System.nanoTime()
for (int line: lines){
    line++;
}
println ((System.nanoTime() - start) / 1_000_000_000)

start = System.nanoTime()
lines.forEach (line -> {
    line++;
})
println ((System.nanoTime() - start) / 1_000_000_000)


start = System.nanoTime()
for (int i=0; i<lines.size(); i++){
    lines.get(i)++;
}
println ((System.nanoTime() - start) / 1_000_000_000)