| Version 9 (modified by chris, 5 years ago) (diff) |
|---|
Table of Contents
Site Load Times
This page is to document the time the site takes to load.
2011-07-05
Summary for the live server:
- The front page, HTML only of the live site, not running varnish takes around 0.1 seconds to load
- The front page of the live site, plus css / js / images etc takes over 30 seconds via pingdom
Issues for the live server:
- ETags and one CSS expression
Summary for the dev server:
- Very fast on port 80 via Varnish, less than two seconds for the page and all objects
- Very slow for port 443, 7 seconds just for the HTML
Issues for the dev server:
- Speed up port 443 accesses!
- Etag and gzipping of js files
Detailed info follows:
Live Server
This is before Varnish has been deployed and also tests have only be done using http as https requests get a 302 redirect back to http.
apache bench
Requests were done from another machine in the same rack, 200 requests for the front page, 10 at a time, using http, this was done several times and the results below are for an average result, some were faster and some were slower, the first request took about 4 seconds and almost all the rest were less that 0.1 second:
ab -v 4 -n 200 -c 10 -H "Accept-Encoding: gzip" http://www.transitionnetwork.org/ LOG: Response code = 200 LOG: header received: HTTP/1.1 200 OK Date: Tue, 05 Jul 2011 12:02:58 GMT Server: Apache X-Drupal-Cache: HIT Etag: "1309867375-0" Cache-Control: public, max-age=0 Last-Modified: Tue, 05 Jul 2011 12:02:55 +0000 Expires: Sun, 11 Mar 1984 12:00:00 GMT Vary: Cookie,Accept-Encoding Content-Encoding: gzip Content-Length: 7727 Connection: close Content-Type: text/html; charset=utf-8 Time taken for tests: 5.131 seconds Complete requests: 200 Percentage of the requests served within a certain time (ms) 50% 57 66% 66 75% 74 80% 77 90% 100 95% 4014 98% 4019 99% 4039 100% 4050 (longest request)
YSlow
- The page has a total of 29 HTTP requests and a total weight of 421.8K bytes with empty cache
- This page has 3 external stylesheets. Try combining them into one.
- This page has 17 external background images. Try combining them with CSS sprites.
- There are a total of 1 CSS expression:
- http://www.transitionnetwork.org/sites/default/files/css/css_9bf5bdd80b33ef2e38c9b89845c474c9.css
- CSS expressions (supported in IE beginning with Version 5) are a powerful, and dangerous, way to dynamically set CSS properties. These expressions are evaluated frequently: when the page is rendered and resized, when the page is scrolled, and even when the user moves the mouse over the page. These frequent evaluations degrade the user experience.
- There are 27 components with misconfigured ETags (all css js and images)
pingdom
The test here will run for 30 secs max and it generally takes longer than that to load the front page, in part because (as far as I can see) pingdom loads all images referenced in the CSS even if the pages doesn't use them. Some stats:
- Total objects: 76 (677.5 KB)
- (X)HTML: 1 (32.8KB)
- CSS: 3 (92.7KB)
- Scripts: 1 (150.7KB)
- Images: 71 (401.2KB)
Dev Server
Running Varnish on port 80 and apache on 443.
apache bench
On port 80, this is with the first hit being passed to apache:
ab -v 4 -n 200 -c 10 -H "Accept-Encoding: gzip" http://dev.transitionnetwork.org/ LOG: Response code = 200 LOG: header received: HTTP/1.1 200 OK Server: Apache Cache-Control: public, max-age=3600 Last-Modified: Tue, 05 Jul 2011 12:51:05 +0000 Expires: Sun, 11 Mar 1984 12:00:00 GMT Vary: Cookie,Accept-Encoding ETag: "1309870265" Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Content-Length: 7353 Date: Tue, 05 Jul 2011 12:51:07 GMT X-Varnish: 1553439536 1553439337 Age: 0 Via: 1.1 varnish Connection: close X-Varnish-Cache: HIT Time taken for tests: 1.616 seconds Complete requests: 200 Percentage of the requests served within a certain time (ms) 50% 3 66% 3 75% 3 80% 3 90% 4 95% 4 98% 5 99% 1412 100% 1412 (longest request)
This is for subsequent requests which don't hit apache:
Time taken for tests: 0.149 seconds Complete requests: 200 Percentage of the requests served within a certain time (ms) 50% 7 66% 7 75% 8 80% 8 90% 9 95% 9 98% 10 99% 11 100% 12 (longest request)
YSlow
- Make fewer HTTP requests
- This page has 3 external stylesheets. Try combining them into one.
- This page has 14 external background images. Try combining them with CSS sprites.
- There are 2 plain text components that should be sent compressed
- There is 1 component with misconfigured ETags
pingdom
Load time between 1 and 1.5 seconds *total*!
- Total objects: 72 (809.7 KB)
- (X)HTML: 1 (31.4KB)
- CSS: 3 (95.8KB)
- Scripts: 1 (113.2KB)
- Images: 61 (364.7KB)
- Other: 6 (204.7KB)
However for HTTPS it times out before loading many objects:
curl
For port 80 we consistently get around 30 mili seconds via Varnish:
curl -o /dev/null http://dev.transitionnetwork.org/
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 32177 100 32177 0 0 2714k 0 --:--:-- --:--:-- --:--:-- 29.7M
Unlike ab we can use curl for port 443, just loading the front page HTML file takes around 7 seconds:
curl -o /dev/null https://dev.transitionnetwork.org/
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 32076 0 32076 0 0 4545 0 --:--:-- 0:00:07 --:--:-- 8172
