Sharing from Takaaki Mizuno - CEO & CTO at Innovatube (http://innovatube.com) : CTO có 20 năm kinh nghiệm cho nhiều công ty tại Nhật và khu vực ĐNA, như Dena Nhật Bản, Dena Hanoi, Baidu, Allied Architects.
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WEB SITE LOADING SPEED IS IMPORTANT
▸ Web site loading speed affect to the Google web search
ranking
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WEB SITE LOADING SPEED IS IMPORTANT
▸ Web site loading speed affect to the revenue of EC site
▸ One Second Could Cost Amazon $1.6 Billion In Sales Per
Year
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HOW TO MAKE THE RESPONSE FASTER
▸ Minify HTML/CSS/JS
▸ Combine CSS/JS*1
▸ Multi Subdomains for images*1
▸ Resize Images
▸ Set HTTP cache headers properly
▸ Lazy Loading
▸ Use HTTP/2
*1 It is not effective when you are using HTTP/2
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YOU CAN CHECK YOUR PAGE WITH
Google Page Speed Insights
https://developers.google.com/speed/pagespeed/insights/
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PNG
▸ Never uses full color PNG images ( 24bit / 32bit )
▸ Change to Index Colored PNG with pngquant
▸ Optimize color index with pngrewrite
▸ Optimize deflete compression with AdvanceCOMP
You Can Reduce Image File Size 20%~
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WEBP
▸ WebP is the Jpeg/PNG alternative image format by Google
▸ Size of image will be 25~34% of Jpeg image
▸ Supported OS/Browsers
▸ Android 4.0~
▸ iOS ( SDWebImage library )
▸ Chrome
▸ IE/Safari/Firefox don’t support
You Can Reduce Image File Size 60%~
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HOW TO KNOW THE CLIENT SUPPORTS WEBP OR NOT
Accept:image/webp,image/*,*/*;q=0.8
Check Accept HTTP Request Header