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Every day, website visitors spend far too much time waiting for websites to load in their browsers. This waiting is partially due to browsers not knowing which resources are critically important so they can prioritize them ahead of less-critical resources. In this blog we will outline how millions of websites across the Internet can improve their performance by specifying which critical content loads first with Cloudflare Workers and what Cloudflare will do to make this easier by default in the future.
Popular Content Management Systems (CMS) like WordPress have made attempts to influence website resource priority, for example through techniques like lazy loading images. When done correctly, the results are magical. Performance is optimized between the CMS and browser without needing to implement any changes or coding new prioritization strategies. However, we’ve seen that these default priorities have opportunities to improve greatly.
In this co-authored blog with Google’s Patrick Meenan we will explain where the opportunities exist to improve website performance, how to check if a specific site can improve performance, and provide a small JavaScript snippet which can be used with Cloudflare Workers to do this optimization for you.