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Enhance Web Performance

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Adam Lu
Adam Lu

The document discusses various techniques for enhancing web performance, including: - Making fewer HTTP requests by combining CSS, JavaScript, and image files - Placing stylesheets in the <head> for faster page loads - Moving scripts to the bottom of the page to allow above-the-fold content to load first - Avoiding CSS expressions and using event handlers instead - Minifying JavaScript and CSS files to reduce file sizes - Making AJAX requests cacheable for better performance

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Enhance Web Performance Adam Lu [email_address] Y!ID: adamlu86 http://adamlu.com/
The Performance Golden Rules 80-90% of the end-user response time is spent on the front-end.
High Performance Web Sites ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Make fewer Http Requests ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Style sheets at the top ,[object Object],[object Object],[object Object],[object Object]
Placing scripts ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Avoid CSS Expressions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Make JS &CSS external ,[object Object],[object Object],[object Object],[object Object]
Minification ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Make Ajax cacheable ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Miscellaneous Tips ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Miscellaneous Tips ,[object Object],[object Object],[object Object],[object Object],[object Object]
Speed Up Javascript
There are four main reasons why a script can take too long to execute ,[object Object],[object Object],[object Object],[object Object]
Too much happening in a loop ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Too much happening in a function ,[object Object],[object Object]
Too much happening in a function ,[object Object],[object Object],[object Object],[object Object]
Too much recursion ,[object Object],[object Object],[object Object],[object Object],[object Object]
Too much DOM interaction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
perform as many changes as possible outside of the live DOM structure ,[object Object],[object Object]
remove a node from the live DOM before operating on it ,[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Proccess the HTMLCollection type ,[object Object],[object Object],[object Object],[object Object]
Fastest way to build an HTML string ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Javascript good practice ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Javascript good practice ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],More On http://www.javascripttoolbox.com/bestpractices/
Minify HTML
Minify HTML ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Css Guidelines
Css Guidelines ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Guidelines for Efficient CSS ,[object Object],[object Object],[object Object],[object Object],https://developer.mozilla.org/en/Writing_Efficient_CSS
Tools of Analyzing Performance ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Thanks!

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