Curl View response time (RT) for a Web site

1. Curl View Web site RT

Curl-o/dev/null -s-w%{time_namelookup}::%{time_connect}::%{time_starttransfer}::%{time_total}::%{speed _download}"\ n""http://www.taobao.com"  02.0.  014::0.015::0.018::0.019::1516256.00  

2. Parameters of Curl

• -O: Write the HTML and JS returned by Curl to the garbage collection station [/dev/null]
• -S: Remove all States

• Curl-o/dev/NULL-W%{time_namelookup}::%{time_connect}::%{time_starttransfer}::%{time_total}::%{speed_download}"\ n" "http://www.taobao.com"    Geneva. % Total% Received%xferd Average Speed Time timeGeneva. Dload Upload Total spent04.100 28774    0 28774    0     01145k0--:--:-- --:--:-- --:--:--7550k05.0.014::0.016::0.020::0.025::1173060.000

  • -W: Write the RT in the following format
  • Time_namelookup:dns Resolving the time domain name [www.taobao.com]
  • Time_commect:client and server end time to establish TCP connections
  • Time_starttransfer: A request from the client; the server in the Web responds to the first byte of time
  • Time_total:client sends a request to the Web server to send all the corresponding data time

Speed_download: Next week speed Unit byte/s

3. The above time RT understanding "Unit is the second"

1. 0.014:dns the time unit of the server parsing www.taobao.com is s
2. 0.015:client the time that a request is made to C/s to establish TCP, including the time of DNS resolution
3. 0.018:client the time at which the first byte of a response is emitted, including the previous 2 time
4. 0.019:client sends a request, to S to send the response data all to the client, and to turn off the connect time
5. 1516256.00: The speed of data next week
7. 1. Establish a TCP connection to the time that the server returns the first byte of the client: 0.018s- 0.015s = 0.003s
8. 2. Server time to send response data to client: 0.019s- 0.018 = 0.01s

Curl View response time (RT) for a Web site