Understanding Metrics

What do the different SpeedCurve metrics represent?

Glossary of metrics you can track with Synthetic and LUX Real User Monitoring.

Written by Steve Souders
Updated over a week ago

Lighthouse scores and audits

We've added Google Lighthouse scores to SpeedCurve. Here's why – plus how to see your scores if you're already a SpeedCurve user.

Written by Tammy Everts
Updated this week

Hero rendering times

How we identify the hero rendering times & adding element timing

Written by Mark Zeman
Updated over a week ago

Why are the SpeedCurve results different from my other test results?

Here's why. But remember: the most important thing to track is consistency and changes within a single testing tool and settings.

Written by Mark Zeman
Updated over a week ago

Blocking JS & CSS

How SpeedCurve detects blocking JavaScript and stylesheets

Written by Steve Souders
Updated over a week ago

How is Speed Index calculated?

What is the Speed Index score and why does it sometimes not align with your other metrics?

Written by Tammy Everts
Updated over a week ago

How to remove a single data point from your test averages

If outlier test results are bumping out your averages, here's how to exclude them.

Written by Tammy Everts
Updated over a week ago

Why don't my charts change when I select median, average, and 95th percentile?

Written by Joseph Wynn
Updated over a week ago

LUX Query Timeouts

How to avoid having LUX queries time out.

Written by Steve Souders
Updated over a week ago

Data Protection & GDPR Compliance at SpeedCurve

Written by Mark Zeman
Updated over a week ago

Why does my fully loaded time fluctuate so much?

Some pages may have very high or fluctuating fully loaded times. Here's why.

Written by Joseph Wynn
Updated over a week ago

Google PageSpeed Insights

Now deprecated in favour of Lighthouse Performance

Written by Mark Zeman
Updated over a week ago

Time Labels in Charts

What exactly do the time labels in the charts mean?

Written by Steve Souders
Updated over a week ago