> For the complete documentation index, see [llms.txt](https://docs.does.qa/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.does.qa/better-coverage/test-page-performance.md).

# Test page performance

Performance Checks score the page with Lighthouse while the journey is already open. Use them on key screens so slow loads fail the Run the same way a broken button would.

Use the **Flow Builder** for this walkthrough.

## Add a Performance Check

{% stepper %}
{% step %}

## Open the page

Start with [**Open**](/test-steps/starter/open.md). Continue with [**Touch**](/test-steps/action/touch.md) and other steps until the screen you care about is showing.
{% endstep %}

{% step %}

## Add Performance

From the [**Validator**](/test-steps/validator.md) family, add [**Performance**](/test-steps/validator/performance.md).

1. Choose a [Comparison Type](/test-step-options/comparison-type.md). The default is greater than or equal to.
2. Set **Value** to the score your team expects. The default is `85`.
   {% endstep %}

{% step %}

## Run and read the result

Start the Run. Open the Performance step in the result to see the score against your threshold.
{% endstep %}
{% endstepper %}

{% hint style="info" %}
**Pro tip:** Put Performance after the page has finished loading and after any login or consent steps. A score on a half-loaded screen is hard to trust.
{% endhint %}

You can add [**SEO**](/test-steps/validator/seo.md), [**Accessibility**](/test-steps/validator/accessibility.md), and other Lighthouse Validators on the same screen when you want several scores in one journey. See [Add accessibility checks](/better-coverage/add-accessibility-checks.md) and [Test SEO](/better-coverage/test-seo.md).

## Related

* [Performance](/test-steps/validator/performance.md)
* [SEO](/test-steps/validator/seo.md)
* [Accessibility](/test-steps/validator/accessibility.md)
* [Best Practices](/test-steps/validator/best-practices.md)
* [Add accessibility checks](/better-coverage/add-accessibility-checks.md)
* [Test SEO](/better-coverage/test-seo.md)