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Application Performance Optimization Checklist

speed optimization checklist web-application

optimize-performance-website's Introduction

Optimize Performance Website

Front-end

Make Fewer HTTP Requests
Put Stylesheets at the Top
Put Scripts at the Bottom
CSS Sprite
Load Asynchronous Scripts file.
Optimize Images: Compress, size specific, don’t scale

Back-end

Database
- Indexes
- Avoid (n+1) query: includes
- Batch loading
- Transaction
- Run big process in background jobs
- Use DNS: To serve images, assets (Sharding Dominant Domains)
- For Rails: Upgrade Rails, update gems, reduce gems
Caching:
- Fragment caching
- Query caching
- Redis caching
Avoid Redirects

Server (Nginx)

Add an Expires Header
Gzip Components
Using proxy to cache
Config number of Worker on Web Server (Nginx)
Using HTTP2

Tools for monitor

New Relic
Pingdom

Tools to measure Speed

PageSpeed Insights: https://developers.google.com/speed/pagespeed/insights
GTMetrix: https://gtmetrix.com
Webpagetest: https://www.webpagetest.org

Resources

High Performance Web Sites Book
PageSpeed Insights Rules: https://developers.google.com/speed/docs/insights/rules
Best Practices for Speeding Up Your Web Site: https://developer.yahoo.com/performance/rules.html

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