Starting in Chrome 151, Chrome will introduce the CPU Performance API, which allows web applications to determine the performance tier of a user's device. This API targets web applications that will use this information to provide an improved user experience, possibly in combination with the Compute Pressure API, which provides information about the user device’s CPU pressure/utilization and allows applications to react to changes in CPU pressure. Users can override the reported performance tier in Chrome's Performance settings. Administrators can also control this behavior using the [CpuPerformanceTierOverride](https://chromeenterprise.google/policies/#CpuPerformanceTierOverride) policy (which takes precedence over the user setting). For more details, see [CPU Performance API Explainer](https://github.com/WICG/cpu-performance).
At present, some video conferencing applications support advanced functionality by relying on internal/private browser extensions or APIs to classify devices into performance categories. Our proposal allows these applications to support existing functionality without depending on such non-standard features. Applications whose functionality depends on client-side hardware detection often resort to running benchmark workloads, to estimate hardware capabilities. Providing a public CPU Performance API would help prevent a needless waste of resources.
Explainers: https://github.com/WICG/cpu-performance