VirtualMV/Internet & Web development (2)/Course materials/Building Web Site/Performance tuning

Introduction

By the end of this page you will be able to: Use an add-in to determine the performance of a web page

Web Performance Best Practices and Rules

Yahoo!’s Exceptional Performance team identified 34 rules that affect web page performance. YSlow’s web page analysis is based on the 23 of these 34 rules that are testable (http://yslow.org/ )

1. Minimize HTTP Requests
2. Use a Content Delivery Network (Duplicates page assets (media) across servers in different geographical locations)
3. Avoid empty src or href
4. Add an Expires or a Cache-Control Header
5. Gzip Components
6. Put StyleSheets at the Top
7. Put Scripts at the Bottom
8. Avoid CSS Expressions
9. Make JavaScript and CSS External
10. Reduce DNS Lookups
11. Minify JavaScript and CSS
12. Avoid Redirects
13. Remove Duplicate Scripts
14. Configure ETags
15. Make AJAX Cacheable
16. Use GET for AJAX Requests
17. Reduce the Number of DOM Elements
18. No 404s
19. Reduce Cookie Size
20. Use Cookie-Free Domains for Components
21. Avoid Filters
22. Do Not Scale Images in HTML
23. Make favicon.ico Small and Cacheable

You can test for each by adding the YSlow plug-in to your web browser. (http://yslow.org/ )

References

virtualMV  |  Superquick wiki guide  |  Please give me some feedback

VirtualMV/Internet & Web development (2)/Course materials/Building Web Site/Performance tuning. (2024). In WikiEducator/VirtualMV wiki. Retrieved November 5, 2024, from http:https://wikieducator.org/VirtualMV/Internet_%26_Web_development_(2)/Course_materials/Building_Web_Site/Performance_tuning    (zotero)