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Web Page Speed Report

Diagnosis

Global Statistics

Object Size Totals

External Objects

Download Times*

*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 14 total objects for this page, that computes to a total lag time due to latency of 2.8 seconds. Note also that this download time calculation does not take into account delays due to XHTML parsing and rendering.

Page 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 14 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 (10 ). 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 191820 bytes, which will load in over 20 seconds on a 56Kbps modem - or 41.03 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.
• TOTAL_SCRIPT - Congratulations, the total number of external script files on this page is 1 . External scripts are less reliably cached than CSS files so consider combining scripts into one to minimize HTTP requests, or even embedding them into high-traffic pages. Placing external JavaScript files at the bottom of your BODY, and CSS files in the HEAD enables progressive display in XHTML web pages.
• HTML_SIZE - Congratulations, the total size of this HTML file is 10462 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 155211 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.
• SCRIPT_SIZE - Congratulations, the total size of all your external scripts is 1962 bytes, which is less than 8K.
• CSS_SIZE - Warning! The total size of your external CSS is 24185 bytes, which is over 20K. Consider optimizing your CSS for size by eliminating whitespace, using shorthand notation, and combining multiple CSS files where appropriate. By using labeled container cells and descendant selectors you can target chunks of HTML content efficiently without the need to embed extra claases and styles.
• MULTIM_SIZE - Congratulations, the total size of all your external multimedia files is 0 bytes, which is less than 10K.