> ## Documentation Index
> Fetch the complete documentation index at: https://docs.autosana.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Performance Monitoring

> Track memory, CPU, and rendering metrics during test runs

Autosana automatically collects performance metrics during test runs across all platforms. After a run completes, a **Performance** section appears on the run detail page with charts and diagnostics.

<Frame>
  <img src="https://mintcdn.com/autosana/cKVUEi_9nwtSQgjY/images/performance-chart.png?fit=max&auto=format&n=cKVUEi_9nwtSQgjY&q=85&s=c5b5777101bb3975c694956eace39690" alt="Performance monitoring charts showing memory and CPU usage over time" width="2806" height="860" data-path="images/performance-chart.png" />
</Frame>

## What's Collected

<Tabs>
  <Tab title="Android">
    | Metric              | Description                                                          |
    | ------------------- | -------------------------------------------------------------------- |
    | **Memory**          | App memory usage, sampled every \~2 seconds                          |
    | **CPU**             | App CPU usage over time                                              |
    | **Frame rendering** | Total frames, slow frames, stutter rate, and render time percentiles |
    | **Device RAM**      | Total device RAM for context (e.g., "350 / 2048 MB")                 |
  </Tab>

  <Tab title="iOS">
    | Metric     | Description                                 |
    | ---------- | ------------------------------------------- |
    | **Memory** | App memory usage, sampled every \~2 seconds |
    | **CPU**    | App CPU usage over time                     |

    <Note>
      iOS metrics are measured from the simulator. Absolute values differ from a real device — use them for **comparing across builds** and detecting regressions.
    </Note>

    <Warning>
      iOS performance monitoring is currently **not available for local CLI runs**. It works for cloud-hosted runs.
    </Warning>
  </Tab>

  <Tab title="Web">
    | Metric              | Description                                               |
    | ------------------- | --------------------------------------------------------- |
    | **Memory**          | JS heap usage over time                                   |
    | **CPU**             | Browser CPU usage over time                               |
    | **Core Web Vitals** | Largest Contentful Paint, Layout Shift, Interaction Delay |
    | **Page timing**     | Server Response, Page Ready, Fully Loaded                 |
    | **Runtime health**  | Blocking tasks, total blocked time, page complexity       |

    Web Vitals thresholds follow [Google's recommendations](https://web.dev/articles/vitals):

    * **Good** (green): LCP ≤ 2.5s, CLS ≤ 0.1, INP ≤ 200ms
    * **Needs work** (amber): LCP ≤ 4s, CLS ≤ 0.25, INP ≤ 500ms
    * **Poor** (red): above those thresholds
  </Tab>
</Tabs>