Performance.java

 public static void main(String[] args) throws InterruptedException {
        var start = Instant.now();
        verySlow();
        var end= Duration.between(start,Instant.now()).toMillis();
        System.out.printf("Time Taken: %dms%n",end);

    }
    private static void verySlow() throws InterruptedException {
        Thread.sleep(1000);
    }

app performance check

app performance check