小编Mel*_*ssa的帖子

我用谷歌搜索,搜索了SO,并阅读主页上推荐的导航时间页面,但无法自行解决.

是什么区别:response_time,:time_to_first_byte和:time_to_last_byte？

从我的理解,以及在导航计时文档,似乎:response_time应该是的总和:time_to_first_byte,和:time_to_last_byte,但是在执行我的测试中,我发现事实并非如此.

    require 'watir-webdriver-performance'

    $response = $browser.performance.summary[:response_time]
    $first_byte = $browser.performance.summary[:time_to_first_byte]
    $last_byte = $browser.performance.summary[:time_to_last_byte]

    def performance_check
        puts ("#{$browser.url}: Response time: #{$response}ms.")

        puts ("#{$browser.url}: Time to first byte: #{$first_byte}ms.")

        puts ("#{$browser.url}: Time to last byte: #{$last_byte}ms.")
    end

    def test_site_01
      $browser.goto("http://www.google.com/")
      performance_check 
    end

我看到的典型输出是:

    http://www.google.com: Response time: 1558ms.
    http://www.google.com: Time to first byte: 384ms.
    http://www.google.com: Time to last byte: 385ms.

谢谢.