Performance Budgets

A web performance budget helps you avoid gradual performance regressions. It allows you to set limits on metrics related to your site performance.

If you set up a performance budget in DebugBear you'll get an alert when a page starts going over budget. You can also set up performance budgeting for your CI builds.

What metrics can you set a budget for?

Right now these metrics are supported:

• Page weight (Total, JavaScript, CSS, Images)
• Lighthouse scores (Performance, Best Practices, Accessibility, SEO)

We'll add more metrics in the future, if you want to set a budget for a specific metric please contact support.

How to set up a performance budget

When creating or editing a monitored page click Show Advanced and the expand the Performance Budgets section.

A page can have two budgets:

• a budget for scheduled tests on production or staging
• a budget for CI builds for a specific branch/commit

You can then create and edit a budget:

Impact on CI builds

If you've set up a budget for API/CLI builds then the builds will fail if the page goes over budget. If you've set up the Github integration the build will also fail on Github.