Sandeep has been the marketer and site manager for ApplianceRepair.com for the past 12 years. He and the developer team have spent much effort improving the user enjoyment of the site. Recently, performance metrics are showing the speed of the site has regressed significantly over time. Which long-term maintenance program can help by limiting certain metrics that affect performance?

A performance budget is a set of defined limits for various performance metrics (e.g., page load time, image size, JavaScript bundle size) that a website must adhere to. It acts as a guardrail, preventing performance regressions over time by ensuring that new features or content don't exceed these established thresholds. This proactive approach helps maintain site speed and user experience. A long-term performance audit is a periodic review, not an ongoing preventative measure. A performance maintenance team would implement solutions but needs a framework like a budget to guide their efforts. An independent testing program verifies performance but doesn't set the limits itself.