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Getting a clearer picture of http response time breakdown via CLI

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I came across this handy python script https://github.com/reorx/httpstat that provides a http response breakdown in text. This saves you having to open up a browser and look at a visual network response waterfall.

For example, using my website homepage and blog for comparision.

$ python httpstat.py http://ronaldbradford.com

HTTP/1.1 200 OK
Date: Fri, 23 Sep 2016 16:52:09 GMT
Server: Apache/2.4.7 (Ubuntu)
X-Powered-By: PHP/5.5.9-1ubuntu4.17
Vary: Accept-Encoding,User-Agent
Cache-Control: max-age=1
Expires: Fri, 23 Sep 2016 16:52:10 GMT
Transfer-Encoding: chunked
Content-Type: text/html

Body stored in: /var/folders/mk/0v6thtzd7mb9sb9r4fhv4bcc0000gn/T/tmpK_foIX

  DNS Lookup   TCP Connection   Server Processing   Content Transfer
[    72ms    |      27ms      |       35ms        |       39ms       ]
             |                |                   |                  |
    namelookup:72ms           |                   |                  |
                        connect:99ms              |                  |
                                      starttransfer:134ms            |
                                                                 total:173ms

$ python httpstat.py http://ronaldbradford.com/blog/

HTTP/1.1 200 OK
Date: Fri, 23 Sep 2016 16:52:39 GMT
Server: Apache/2.4.7 (Ubuntu)
X-Powered-By: PHP/5.5.9-1ubuntu4.17
X-Pingback: http://ronaldbradford.com/blog/xmlrpc.php
Vary: Accept-Encoding,User-Agent
Cache-Control: max-age=1
Expires: Fri, 23 Sep 2016 16:52:40 GMT
Transfer-Encoding: chunked
Content-Type: text/html; charset=UTF-8

Body stored in: /var/folders/mk/0v6thtzd7mb9sb9r4fhv4bcc0000gn/T/tmpn5R1f2

  DNS Lookup   TCP Connection   Server Processing   Content Transfer
[     5ms    |      34ms      |       129ms       |       790ms      ]
             |                |                   |                  |
    namelookup:5ms            |                   |                  |
                        connect:39ms              |                  |
                                      starttransfer:168ms            |
                                                                 total:958ms

Note that 301 redirects are not handled so be sure you are getting the full content you expect in a request.

$ python httpstat.py http://ronaldbradford.com/blog

HTTP/1.1 301 Moved Permanently
Date: Fri, 23 Sep 2016 16:52:22 GMT
Server: Apache/2.4.7 (Ubuntu)
Location: http://ronaldbradford.com/blog/
Cache-Control: max-age=1
Expires: Fri, 23 Sep 2016 16:52:23 GMT
Content-Length: 322
Content-Type: text/html; charset=iso-8859-1

Body stored in: /var/folders/mk/0v6thtzd7mb9sb9r4fhv4bcc0000gn/T/tmptLSJTv

  DNS Lookup   TCP Connection   Server Processing   Content Transfer
[     5ms    |      61ms      |       39ms        |        0ms       ]
             |                |                   |                  |
    namelookup:5ms            |                   |                  |
                        connect:66ms              |                  |
                                      starttransfer:105ms            |
                                                                 total:105ms