What should the administrator enable while configuring the front end optimization (FEO) feature to improve page rendering time?

What should the administrator enable while configuring the front end optimization (FEO) feature to improve page rendering time?

• A. HTML comments removal
• B. Image lazy loading
• C. CSS import to link
• D. Domain sharding

Answer: (D)

Front end optimization aims to reduce render-blocking work and speed up how quickly a page starts rendering. Enabling domain sharding helps the browser fetch many resources in parallel by distributing them across multiple hostnames. Since browsers limit the number of simultaneous connections to a single domain, spreading assets over several domains lets more resources download at the same time, reducing queueing and improving render time. The other options offer smaller or more situational gains. Removing HTML comments trims some bytes but rarely moves the needle on render time. Lazy loading defers off-screen images and improves perceived performance after the initial render rather than speeding up the first paint. Converting CSS imports to separate links can reduce some blocking behavior, but it doesn’t address the parallel download bottleneck as effectively as increasing concurrent connections via domain sharding.

Front end optimization aims to reduce render-blocking work and speed up how quickly a page starts rendering. Enabling domain sharding helps the browser fetch many resources in parallel by distributing them across multiple hostnames. Since browsers limit the number of simultaneous connections to a single domain, spreading assets over several domains lets more resources download at the same time, reducing queueing and improving render time.

The other options offer smaller or more situational gains. Removing HTML comments trims some bytes but rarely moves the needle on render time. Lazy loading defers off-screen images and improves perceived performance after the initial render rather than speeding up the first paint. Converting CSS imports to separate links can reduce some blocking behavior, but it doesn’t address the parallel download bottleneck as effectively as increasing concurrent connections via domain sharding.