Performance Optimizing Tips

Some performance optimizing tips

Transcript

1. PERFORMANCE OPTIMIZING TIPS FOR PHP WEBSITE OanhNN & QuangNV
2. Content: • Web system • Web resources • How gzip compression works • HTTP Caching • PHP performance tips • Others
3. Web system Database Cache DB (memcached, apc, …) Web App (PHP, ASP, JSP, …) Web resources (css, js, img, …) Web server + HTTP Cache Web browser, App client
4. Web resources: • HTML (static page) • CSS • Javascript • Images • ….
5. HTML • Use HTML 5: new, lightweight, … • According to the HTML 4 DTD, you can omit the following tags. • Combine external JavaScript files • Include external CSS files before external JavaScript files
6. CSS • Remove unused CSS. • Using every declaration just once means making strict use of selector grouping. • Minify CSS files.
7. Javascript (js) • Optimizing JavaScript code • Speeding up JavaScript: Working with the DOM • Minify JavaScript • Compressing your JavaScript with Closure Compiler • Use Asynchronous load
8. Images & Web graphics • Compress images (TinyPNG) • Use a lot of small images on big images • Use lazy load • Optimizing canvas draw
9. Gzip
10. Gzip • Browser: • Connects to server. • Notifies server that browser supports gzip "Accept-Encoding: gzip". • Server: • Acknowledges gzip support. • Sends gzip encoded page with header "Content-Encoding: gzip". • Browser: • Receive page. • Decode gzip encoded page based on header "Content-Encoding: gzip". • Display page.
11. HTTP Caching
12. PHP performance tips • Upgrade your version of PHP • Use caching • Use output buffering • Avoid writing naive setters and getters • Don't copy variables for no reason • Avoid doing SQL queries within a loop • Sometimes, performance of native PHP function is not best
13. native function vs. defined function
14. native function vs. defined function
15. Others • Using HTML 5 for performance improvements • Store web resources on diff • Reduce the number of requests and the amount of data transferred
16. References • https://developers.google.com/speed/articles • https://developers.google.com/speed/articles/optimizing-i mages • http://phpmaster.com/
17. Q&A