How to hack your Google Lighthouse scores in 2024
Blog post from Sentry
Google Lighthouse is a tool used to assess web page performance, prioritizing usability over raw speed. Its performance score is calculated using a weighted combination of core web vital metrics and other speed-related metrics. The main goal of this article is to explore how to "hack" Google Lighthouse scores in favor, while also acknowledging that these hacks may not be suitable for real-world use cases. To improve FCP scores, displaying a minimal viable LCP element on load can trick Lighthouse into thinking the page is useful quicker than it actually is. However, this approach should not be used to compromise user experience. Similarly, deferring loading content that will cause layout shifts until the Lighthouse test has likely finished can improve CLS scores. The Speed Index score and TBT score cannot be "hacked" as they are based on real page load times. Ultimately, Google Lighthouse is just a rough guide for debugging performance, and its limitations should not be overlooked.
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