Java Webdriver在下面给出的代码中花费了大量时间来搜索元素

Question

当系统调用下面给出waitforelement方法时，搜索元素花费了很多时间。有什么理由吗？或者我的代码中有什么问题，请在下面给出：

public void WaitForElement(int source, String elementName)
        throws InterruptedException {
    try {
        for (int second = 0; second <= 60; second++) {
            Thread.sleep(1000);
            switch (source) {
            case 1:
                if (isElementPresent(By.id(elementName))) {
                    System.out.println("Element Found :" + elementName);
                    second = 60;
                    break;
                } else {
                }

            case 2:
                if (isElementPresent(By.xpath(elementName))) {
                    System.out.println("Element Found :" + elementName);
                    second = 60;
                    break;
                }
            case 3:
                if (isElementPresent(By.name(elementName))) {
                    System.out.println("Element Found :" + elementName);
                    second = 60;
                    break;
                }

            case 4:
                if (isElementPresent(By.className(elementName))) {
                    System.out.println("Element Found :" + elementName);
                    second = 60;
                    break;
                }
            case 5:
                if (isElementPresent(By.cssSelector(elementName))) {
                    System.out.println("Element Found :" + elementName);
                    second = 60;
                    break;
                }
            case 6:
                if (isElementPresent(By.linkText(elementName))) {
                    System.out.println("Element Found :" + elementName);
                    second = 60;
                    break;
                }
            case 7:
                if (isElementPresent(By.partialLinkText(elementName))) {
                    System.out.println("Element Found :" + elementName);
                    second = 60;
                    break;
                }
            case 8:
                if (isElementPresent(By.tagName(elementName))) {
                    System.out.println("Element Found :" + elementName);
                    second = 60;
                    break;
                }
            default:
                System.out.println("Element not found: " + elementName);
            }
        }
    } catch (Exception e) {
        System.out.println(e);
    }
    Thread.sleep(1000);
}