在 idea 中执行与在命令行执行，速度怎么相差这么大

[chaoschick]

public class Main {
public static void main(String[] args) {
long startTime = System.nanoTime();
long startTime2 = System.currentTimeMillis();
for (int i = -1; ++i < 1000; ) {
String row = "Column 1: " + "1" + ", Column 2: " + "2" +
", Column 3: " + "3" + ", Column 3: " + "4";
System.out.println(row);
}
long endTime = System.nanoTime();
long endTime2 = System.currentTimeMillis();

long durationInMillis = (endTime - startTime) / 1_000_000;
long durationInMillis2 = (endTime2 - startTime2) / 1;
System.out.println("Time taken to output the result: " + durationInMillis + " milliseconds");
System.out.println("Time taken to output the result: " + durationInMillis2 + " milliseconds");
}
}


idea
点击运行

Time taken to output the result: 6 milliseconds
Time taken to output the result: 6 milliseconds


cmd 命令提示符
java Main.java

Time taken to output the result: 143 milliseconds
Time taken to output the result: 145 milliseconds

[chaoschick]

@seanzxx 那多半就是 windows 的终端有问题了 我试过 windows 的 cmd 与 powershell 都有这个问题

[chaoschick]

g++ main.cpp -O3
a.exe

windows 7 (vmware)
Time taken to output the result: 122.007 milliseconds

windows 10 (物理机)
Time taken to output the result: 3.7429 milliseconds

windows server 2019 (内网服务器)
Time taken to output the result: 73.7804 milliseconds