如图：Stalled、RequestSent等所表达的是什么意思呢？
个人理解：Stalled : Finish LoadingRequestSent : 请求发送时间
坐等大神来解释
Stalled是浏览器得到要发出这个请求的指令，到请求可以发出的等待时间，一般是代理协商、以及等待可复用的TCP连接释放的时间，不包括DNS查询、建立TCP连接等时间等Request sent请求第一个字节发出前到最后一个字节发出后的时间，也就是上传时间Waiting请求发出后，到收到响应的第一个字节所花费的时间(Time To First Byte)Content Download收到响应的第一个字节，到接受完最后一个字节的时间，就是下载时间
帮助文档的话，官方链接 https://developer.chrome.com/devtools/docs/network#resource-network-timing
上面链接已失效，感谢评论指正
https://developers.google.com/web/tools/chrome-devtools/profile/network-performance/resource-loading#resource-network-timing
Stalled/Blocking
Time the request spent waiting before it could be sent. This time is
inclusive of any time spent in proxy negotiation. Additionally, this
time will include when the browser is waiting for an already
established connection to become available for re-use, obeying
Chrome's maximum six TCP connection per origin rule.Proxy Negotiation
Time spent negotiating with a proxy server connection.
DNS Lookup
Time spent performing the DNS lookup. Every new domain on a page
requires a full roundtrip to do the DNS lookup.Initial Connection / Connecting
Time it took to establish a connection, including TCP
handshakes/retries and negotiating a SSL.SSL
Time spent completing a SSL handshake.
Request Sent / Sending
Time spent issuing the network request. Typically a fraction of a
millisecond.Waiting (TTFB)
Time spent waiting for the initial response, also known as the Time To
First Byte. This time captures the latency of a round trip to the
server in addition to the time spent waiting for the server to deliver
the response.Content Download / Downloading
Time spent receiving the response data.
stall 延迟 一般是dns pac脚本 tcp握手等耗时
request sent 发送请求，上传文件的话会耗时较长
waiting 请求发送完毕到接收到第一个字节的内容(网络延时＋服务器处理耗时) time to first byte
content download 下载内容耗时