- `metric_computation_duration_seconds`: The time(seconds) that the HPA controller takes to calculate one metric.
  - `metric_computation_total`: Number of metric computations. ([#116326](https://github.com/kubernetes/kubernetes/pull/116326), [@sanposhiho](https://github.com/sanposhiho)) [SIG Apps, Autoscaling and Instrumentation]

    * Function is linear between points. Resource utilization is defined as one minus ratio of total amount of resource requested by pods on node and node's capacity (scaled to 100).
    * Final utilization used for computation is arithmetic mean of cpu utilization and memory utilization.
    * Function is disabled by default and can be enabled via scheduler policy config file.

- The scheduler is now optimized to throttle computational tasks involved with node selection. ([#67555](https://github.com/kubernetes/kubernetes/pull/67555), [@wgliang](https://github.com/wgliang)) Courtesy of SIG API Machinery, and SIG Scheduling