Web Governance
How Performance scores are calculated
Acquia Web Governance uses Google Lighthouse, a tool that delivers data to the Performance module with a performance weighting system. Weighting of the different metrics in the calculation of the overall score can change with any upgrade. You may experience a change in your Performance Score as a result of any Google Lighthouse upgrade.
The History Center displays an indication when the version changes, in order to help you understand why the Performance score shows a sudden jump.
For more information on how the scores are calculated, visit:
2. Excluding archived profiles from the Average Performance score
In the History Center, Web Governance displays an Average Performance score which is calculated as the average of all the Performance Scores of your pages. For example, if you run performance scans on six pages, the Average Performance score is the average score of those six.
Archived profiles are disregarded from the Average Performance score calculation. This makes the score more accurate. This only affects your score if you have archived Performance profiles on your account.
How the Performance score is weighted:
The Performance score is a weighted average of the metric scores. Metrics that are more heavily weighted have a greater effect on your overall performance score.
The metric scores are not visible in the report but are calculated in the background.
The weightings are chosen to provide a balanced representation of your perception of performance.
Explore scoring with the Lighthouse scoring calculator.
When the performance metrics are gathered, (mostly reported in milliseconds), Lighthouse converts each raw metric value into a metric score from 0 to 100 by looking where the metric value falls on its Lighthouse scoring distribution.
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Web Governance