6 posts tagged with "Page Speed Data"

Synthetic website performance tests measure page load time in a controlled lab environment with a specified network speed.

Since these tests are often run on a computer with a fast network connection, the network needs to be throttled to achieve a consistent result that reflects how visitors with a slower connection would experience the page.

However, there are different ways to throttle the network. This article explains why packet-level throttling is the most reliable option and how it’s different from network throttling in Chrome DevTools or the default settings in Google Lighthouse.

The Cumulative Layout Shift (CLS) metric measures how much content moves around on a web page after rendering.

However, sometimes real users experience layout shifts that can’t easily be replicated in lab-based test results. This article looks at why this happens and what you can do to identify and fix these layout shifts.

This article explains what Lighthouse simulated throttling is and how it can lead to inaccurate site speed metrics. We'll also look at alternative ways to test your site speed.

Web performance metrics always vary somewhat between tests. This variability will be lower for simple static sites, and higher for complex dynamic content that changes every time the page is loaded.

One way to reduce variability in recorded metrics is to run each test several times and only save the average result.

This article will look at three different websites and investigate how much running tests 1, 3, 5, or 7 times reduces variability.

When running page speed tests using different tools you'll often find that the metrics they report don't match up exactly, or may even show significant discrepancies.

This article explains why you might see score and metric differences between PageSpeed Insights, Lighthouse, and other tools.

Network throttling can simulate how users on a slow connection would experience loading a website. There are different ways to simulate a slower connection, and you'll see different results depending on which one you use.