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Web Page Speed Report

Title:Oulun yliopisto
Date:Report run on Tue Jun 9 03:09:51EDT2009


Global Statistics

Total HTTP Requests:20
Total Size:154876 bytes

Object Size Totals

Object typeSize (bytes)Download @ 56K (seconds)Download @ T1 (seconds)
HTML:36222 7.42 0.39
HTML Images:102810 22.89 2.94
CSS Images:8526 2.70 1.05
Total Images:111336 25.59 3.99
Javascript:0 0.00 0.00
CSS:7318 1.86 0.44
Multimedia:0 0.00 0.00
Other:0 0.00 0.00

External Objects

External ObjectQTY
Total HTML:1
Total HTML Images:12
Total CSS Images:5
Total Images:17
Total Scripts:0
Total CSS imports:2
Total Frames:0
Total Iframes:0

Download Times*

Connection RateDownload Time
14.4K 124.04 seconds
28.8K 64.02 seconds
33.6K 55.44 seconds
56K 34.87 seconds
ISDN 128K 13.45 seconds
T1 1.44Mbps 4.82 seconds

*Note that these download times are based on the full connection rate for ISDN and T1 connections. Modem connections (56Kbps or less) are corrected by a packet loss factor of 0.7. All download times include delays due to round-trip latency with an average of 0.2 seconds per object. With 20 total objects for this page, that computes to a total lag time due to latency of 4 seconds. Note also that this download time calculation does not take into account delays due to XHTML parsing and rendering.

Page Objects

1 48707 IMG Header size = 222 bytes  
1 36222 HTML Header size = 448 bytes
Up to 27224 bytes could have been saved through compression.
View a formatted version of this HTML file  
1 15718 IMG ... vat/yhteinenyliopisto.gif Header size = 222 bytes  
1 12061 IMG ... etusivunkuvat/aktuumi.jpg Header size = 223 bytes  
1 10811 IMG ... usivunkuvat/ahtisaari.jpg Header size = 223 bytes  
1 8286 IMG ... vat/yliopistouudistus.gif Header size = 221 bytes  
1 5773 CSS Header size = 219 bytes
Up to 4351 bytes could have been saved through compression.
View a formatted version of this CSS file  
1 4219 CSS IMG ... uvat/juhlavuositausta.gif Header size = 221 bytes  
1 4089 IMG ... /grafiikka/logo_suomi.gif Header size = 220 bytes  
1 2131 CSS IMG ... rafiikka/ylamosaiikki.gif Header size = 220 bytes  
1 1705 IMG ... fiikka/vasenmosaiikki.gif Header size = 220 bytes
Missing height attribute.  
1 1644 CSS IMG ... iikka/taustat/harmaa1.gif Header size = 220 bytes  
1 1545 CSS ... ajankohtaistyylit2006.css Header size = 218 bytes
Up to 1150 bytes could have been saved through compression.
View a formatted version of this CSS file  
1 1253 IMG ... aitoskirjantekijoille.gif Header size = 220 bytes  
1 566 CSS* Header size = 217 bytes  
2 329 CSS IMG ... grafiikka/vasentausta.gif Header size = 219 bytes  
1 203 CSS IMG ... afiikka/otsikkotausta.gif Header size = 218 bytes  
1 45 IMG ... kikuvakkeet/keltainen.gif Header size = 217 bytes  
5 45 IMG ... inkkikuvakkeet/vihrea.gif Header size = 217 bytes  
5 45 IMG ... kkikuvakkeet/punainen.gif Header size = 217 bytes  
2 45 IMG ... kikuvakkeet/keltainen.gif Header size = 217 bytes  
20 ^ 154876*   Total (^unique objects)

# This site is not using HTTP compression, otherwise called content encoding using gzip. Consider compressing your textual content (XHTML, JavaScript, etc.) with mod_gzip or similar products.

* CSS alternate stylesheets may be referenced in the HTML but are not actually downloaded until they are needed and are therefore not included in the total page size.

Analysis and Recommendations

  • TOTAL_HTML - Congratulations, the total number of HTML files on this page (including the main HTML file) is 1 which most browsers can multithread. Minimizing HTTP requests is key for web site optimization. Y
  • TOTAL_OBJECTS - Caution. You have 20 total objects on this page. From 12 to 20 objects per page, the latency due to object overhead makes up from 75% to 80% of the delay of the average web page. See Figure II-3: Relative distribution of latency components showing that object overhead dominates web page latency in Website Optimization Secrets for more details. Consider reducing, eliminating, and combining external objects (graphics, CSS, JavaScript, iFrames and XHTML) to reduce the total number of objects, and thus separate HTTP requests. Consider using CSS sprites to help consolidate decorative images.
  • TOTAL_IMAGES - Caution. You have a moderate amount of images on this page (17 ). Consider using fewer images on the site or try reusing the same image in multiple pages to take advantage of caching. Using CSS techniques such as colored backgrounds, borders, or spacing instead of graphic techniques can help reduce HTTP requests.
  • TOTAL_CSS - Congratulations, the total number of external CSS files on this page is 2 . Because external CSS files must be in the HEAD of your HTML document, they must load first before any BODY content displays. Although they are cached, CSS files slow down the initial display of your page. Remember to place CSS files in the HEAD and JavaScript files at the end of the BODY to enable progressive display.
  • TOTAL_SIZE - Caution. The total size of this page is 154876 bytes, which will load in over 20 seconds on a 56Kbps modem - or 34.87 seconds on a 56Kbps modem. Consider reducing total page size to less than 100K to achieve sub 20 second response times on 56K connections. Be sure to provide feedback for pages over 100K by layering your design to display useful content within the first two seconds. Consider optimizing your site with Website Optimization Secrets, Speed Up Your Site or contacting us about our optimization services.
  • HTML_SIZE - Congratulations, the total size of this HTML file is 36222 bytes, which less than 50K. Assuming that you specify the HEIGHT and WIDTH of your images, this size allows your HTML to display content in under 10 seconds, the average time users are willing to wait for a page to display without feedback.
  • IMAGES_SIZE - Warning! The total size of your images is 111336 bytes, which is over 100K. Consider optimizing images for size, combining them, and replacing graphic rollovers with CSS. You can often switch graphic formats to achive smaller file sizes (from JPEG to PNG for example). Finally, substitute CSS techniques for graphics techniques to create colored borders, backgrounds, and spacing.
  • CSS_SIZE - Congratulations, the total size of your external CSS is 7318 bytes, which is less than 8K.
  • MULTIM_SIZE - Congratulations, the total size of all your external multimedia files is 0 bytes, which is less than 10K.