24 lines
724 B
Text
24 lines
724 B
Text
// version 1.1.2
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// need to enable runtime assertions with JVM -ea option
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import java.lang.management.ManagementFactory
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import java.lang.management.ThreadMXBean
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fun countTo(x: Int) {
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println("Counting...");
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(1..x).forEach {}
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println("Done!")
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}
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fun main(args: Array<String>) {
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val counts = intArrayOf(100_000_000, 1_000_000_000)
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val threadMX = ManagementFactory.getThreadMXBean()
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assert(threadMX.isCurrentThreadCpuTimeSupported)
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threadMX.isThreadCpuTimeEnabled = true
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for (count in counts) {
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val start = threadMX.currentThreadCpuTime
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countTo(count)
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val end = threadMX.currentThreadCpuTime
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println("Counting to $count takes ${(end-start)/1000000}ms")
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}
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}
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