这是修改后的功能：根据社区的建议，随时对其进行修订，使其成为社区Wiki。
static double Profile(string description, int iterations, Action func) {
//Run at highest priority to minimize fluctuations caused by other processes/threads
Process.GetCurrentProcess().PriorityClass = ProcessPriorityClass.High;
Thread.CurrentThread.Priority = ThreadPriority.Highest;
// warm up
func();
var watch = new Stopwatch();
// clean up
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
watch.Start();
for (int i = 0; i < iterations; i++) {
func();
}
watch.Stop();
Console.Write(description);
Console.WriteLine(" Time Elapsed {0} ms", watch.Elapsed.TotalMilliseconds);
return watch.Elapsed.TotalMilliseconds;
}
确保 。最后一部分很重要，因为即使在发布模式下，JIT也会通过附加的调试器来限制其优化。
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