AWS CF compression

 

AWS CloudFront (CF) automatically compresses certain types of objects (files) and serve the compressed objects when viewers (web browsers or other clients) support them. Viewers indicate their support for compressed objects with the Accept-Encoding HTTP header. CloudFront can compress objects using the Gzip and Brotli compression formats. When the viewer supports both formats, CloudFront prefers Brotli.

Chrome and Firefox web browsers support Brotli compression only when the request is sent using HTTPS. These browsers do not support Brotli with HTTP requests.

When requested objects are compressed, downloads can be faster because the objects are smaller—in some cases, less than a quarter the size of the original. Especially for JavaScript and CSS files, faster downloads can result in faster rendering of webpages for your users. In addition, because the cost of CloudFront data transfer is based on the total amount of data served, serving compressed objects can be less expensive than serving them uncompressed.

CloudFront only compresses objects that have one of the following values in the Content-Type response header:

1. application/dash+xml
2. application/eot
3. application/font
4. application/font-sfnt
5. application/javascript
6. application/json
7. application/opentype
8. application/otf
9. application/pkcs7-mime
10. application/protobuf
11. application/rss+xml
12. application/truetype
13. application/ttf
14. application/vnd.apple.mpegurl
15. application/vnd.mapbox-vector-tile
16. application/vnd.ms-fontobject
17. application/xhtml+xml
18. application/xml
19. application/x-font-opentype
20. application/x-font-truetype
21. application/x-font-ttf
22. application/x-httpd-cgi
23. application/x-javascript
24. application/x-mpegurl
25. application/x-opentype
26. application/x-otf
27. application/x-perl
28. application/x-ttf
29. font/eot
30. font/opentype
31. font/otf
32. font/ttf
33. image/svg+xml
34. text/css
35. text/csv
36. text/html
37. text/javascript
38. text/js
39. text/plain
40. text/richtext
41. text/tab-separated-values
42. text/xml
43. text/x-component
44. text/x-java-source
45. text/x-script
46. vnd.apple.mpegurl

Ultimately, I realize a significant performance improvement on leveraging AWS CF compression.