Timing Analysis of Chrome browser

Take the website as an example:

stalled is the browser gets the instructions to issue this request, to the wait time that the request can be issued, typically the agent negotiation, and the time that waits for the reusable TCP connection to be released, excluding DNS queries, establishing TCP connections, and so on.

SSL Security Sockets layer Secure Sockets Layer, and its successor Transport Layer Security (Transport layer Security,tls) is a security protocol that provides security and data integrity for network traffic. TLS encrypts the network connection with SSL at the transport layer.
The current version of SSL is 3.0. It has been widely used for authentication and encrypted data transfer between Web browsers and servers.

　　Request sent the time after the first byte is emitted before the last byte is sent, that is, the upload time
　　waiting The time it takes to receive the first byte of a response after the request is issued

First byte time:
The time the browser starts to receive server response data = background processing time + redirect time, which is an important indicator to reflect the response speed of the service side

　　TTFB (Time to first byte), which is the period when the initial network request was initiated from the server to receive the initial byte, it contains the TCP connection time, the time the HTTP request was sent, and the time the first byte of the response message was received. Note: The more Web page redirects, the higher the TTFB, so reduce the redirection

　　Content Download receives the first byte of the response, to the time when the last byte is received, is the download time

PS:SSL expansion

　　HTTPS(hypertext Transfer Protocol Secure) Security Hypertext Transfer Protocol
It is developed by Netscape and built into its browser to compress and decompress data and return the results that are sent back on the network. HTTPS actually applies the Netscape Full Sockets Layer (SSL) as a sub-layer of the HTTP application layer. (HTTPS uses port 443 instead of using port 80来 and TCP/IP to communicate like HTTP.) SSL uses 40-bit keywords as the RC4 stream encryption algorithm, which is appropriate for the encryption of business information. HTTPS and SSL support use of the digital authentication of the number, and if necessary, the user can confirm who the sender is.
HTTPS is a security-targeted HTTP channel, which is simply the security version of HTTP. That is, the SSL layer is added under HTTP, and the security base of HTTPS is SSL.

Timing Analysis of Chrome browser