Why am I receiving these alerts?

These alerts come from performance budgets in SpeedCurve. If you've only recently created a SpeedCurve account, then these alerts likely came from the default budgets that we set up for you. 

What do the alerts mean?

The alerts are to tell you when the performance of your web pages has gone over a predefined threshold, or changed significantly. Each alert contains one or more "budget crossings", which are charts and information about changes detected in your pages.

How do I turn off the alerts?

To turn off all performance budget alerts, you need to log into your SpeedCurve account and remove your email address from the Alerts section of the Settings page.

You can also disable alerts for specific budgets or charts:

  1. Click on a chart in the alert to go to the SpeedCurve dashboard containing the chart.
  2. Click on the Edit link at the top-right of the chart (you may need to log into SpeedCurve before this is visible). 
  3. Expand the Set a performance budget section of the chart editor and set the alerts toggle to Off.
  4. Click Save

What do the charts in the alert mean?

Each alert contains one or more "budget crossings". At a glance, you can see the following information for each crossing: 

  • The budget metric. Read about what the different metrics mean.
  • The name of the team that the budget belongs to.
  • The value of the budget threshold.
  • The current value of the metric, and how far above or below the threshold that value is.
  • A chart showing several days of historic data leading up to the budget crossing. Clicking on the chart will take you to the budget in SpeedCurve.

Why do some charts have a red threshold line where others have a green boundary?

All performance budgets have an absolute threshold. When a chart crosses this threshold, it is represented by a red line. Budgets can also have a relative threshold, which is represented by a green boundary. Read on to learn more.

Absolute thresholds

When you create a performance budget you set an absolute threshold. Alerts will be sent for this budget whenever the latest value for the metric crosses this threshold.

Alerts for absolute threshold crossings will include a chart similar to what you will see in your Site dashboard. The red line represents the value of the absolute threshold. Values over the threshold will be coloured red.

Relative thresholds

As well as the absolute threshold, you can also set a relative threshold or rate of change for a budget. Alerts will be sent for this budget whenever the latest value for the metric is different to the previous value by the amount specified.

Alerts for rate of change crossings also include a chart, but the threshold is represented in a slightly different way. We don't draw a red threshold line on these charts because the threshold is based on the previous value of each point. Instead, we draw a threshold range based on the average upper bound (the previous value plus the rate of change) and the average lower bound (the previous value minus the rate of change).

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