AI BriefingAWS Improves Loading Speed by ~20% with HTTP/2 via CloudFront and ALB
Key point
Applying HTTP/2 through AWS CloudFront and ALB configuration alone can reduce loading times by approximately 20%, requiring a review of existing HTTP/1 optimization techniques.
Details
HTTP/2 can be applied with simple configuration, without complex development, via AWS CloudFront and Application Load Balancer (ALB). CloudFront supports this by checking the supported HTTP version in the console, while ALB can be configured by adding an HTTPS listener in an Elastic Beanstalk environment. Performance improvements can be expected even if communication between the load balancer and web server remains HTTP/1, provided the connection to the browser is HTTP/2.
Actual test results showed that on a page containing 30 images, the DOMContentLoaded time decreased from 14.65 seconds to 11.45 seconds, a reduction of approximately 20%, when HTTP/2 was applied compared to HTTP/1. HTTP/2 resolves the HOL Blocking and increased RTT issues of HTTP/1 through Multiplexing, Header Compression, and Server Push. However, techniques such as domain sharding and image sprites, previously used for HTTP/1 optimization, may be inefficient in an HTTP/2 environment and require review.
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