Os Smarr

High-Performance JavaScript: Why Everything You’ve Been Taught is Wrong ,[object Object],[object Object]

About me ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],http://JosephSmarr.com

About Plaxo ,[object Object],[object Object],[object Object],[object Object],[object Object],http://www.plaxo.com

Plaxo Online AJAX Desktop beta.plaxo.com ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Looks great…but it almost didn’t ship! ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Where did we go wrong?? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Why Everything You’ve Been Taught is Wrong ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Why High-Performance JavaScript Matters ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The High-Performance JS Mantra ,[object Object],[object Object],[object Object],[object Object]

Write less code ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Be Lazy: Nothing is faster than doing nothing

Total code size of some AJAX apps

Load JavaScript on-demand ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Be Lazy: Nothing is faster than doing nothing “ I work hard at being lazy” Ryan “Roger” Moore

Draw UI as late as possible ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Be Lazy: Nothing is faster than doing nothing

How to Be Lazy ,[object Object],[object Object],[object Object],Be Lazy: Nothing is faster than doing nothing

Minimize initial perceived load time ,[object Object],[object Object],[object Object],Be Responsive: Jump when the user says jump

Yield early and often ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Be Responsive: Jump when the user says jump

Cache backend responses ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Be Responsive: Jump when the user says jump “ Data structures and AJAX—together at last!” Glenn “Fiddich” Dixon

How to Be Responsive ,[object Object],[object Object],[object Object],Be Responsive: Jump when the user says jump

Play to the browser’s strengths ,[object Object],[object Object],[object Object],[object Object],[object Object],Be Pragmatic: Don’t make things even harder

Cheat when you can / should ,[object Object],[object Object],[object Object],[object Object],[object Object],Be Pragmatic: Don’t make things even harder

Inline initial API calls & HTML ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Be Pragmatic: Don’t make things even harder

How to Be Pragmatic ,[object Object],[object Object],[object Object],Be Pragmatic: Don’t make things even harder

Profile like crazy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Be Vigilant: Only you can prevent slow web apps

Consider performance from day one ,[object Object],[object Object],[object Object],[object Object],[object Object],Be Vigilant: Only you can prevent slow web apps

[object Object],[object Object],[object Object],[object Object],Get your priorities straight Be Vigilant: Only you can prevent slow web apps “ Performance first, features second!” Todd & Cam

How to Be Vigilant ,[object Object],[object Object],[object Object],Be Vigilant: Only you can prevent slow web apps

Conclusion: Avoid making the same mistakes we did ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Just Remember: Everything You’ve Been Taught is Wrong ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],http://JosephSmarr.com

Os Smarr

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