Remove tag filmstrip
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10 things I love about SpeedCurve (that I think you'll love, too)

Speed Curve

That means you get all that same rich data, screenshots, and filmstrips that you can compare. Third parties add tons of value by increasing conversions (via targeting beacons) and helping you understand your users in unprecedented ways (via analytics tags). You can also drill down and focus on things like construction.

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Google Lighthouse Audits – How to use Chrome’s built-in speed testing tool

MachMetrics

In addition, you’ll see a filmstrip of your site loading, as well as some additional diagnostics. For example: The page isn’t blocked from indexing All images have alt tags robots.txt is valid The document has a meta description. Alt tags, title tags, and accessible button names are all checked, to name a few.

Google 82
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Solving CLS Issues In A Next.js-Powered E-Commerce Website (Case Study)

Smashing Magazine

Then we ran WebpageTest and decided to check the filmstrip view: The filmstrip view shows any frame which has a visual change and layout shift with a yellow dotted line. It is built on top of <img> HTML tag and can help to improve LCP and CLS. That also did not show any element causing a high CLS value. Large preview ).

Website 105
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Load scripts async

Speed Curve

This blog post has a simple conclusion: Load script asynchronously! What we see is that the HTML parser stops when it encounters a SCRIPT tag until that script is downloaded, parsed, and executed. Because the HTML parser stopped, all network traffic also stopped (because no other HTML tags were parsed to initiate HTTP requests).

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WebPageTest Scripting: Examples for advanced speed testing scenarios

MachMetrics

However this script isn’t just for ads – it also allows you to measure the performance of your site without 3rd party tags , again removing the noise you see in your trends and giving you a more stable representation of the site speed that you have control over. You can then line up tests side by side and compare them.

Speed 57
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The Humble ` ` Element And Core Web Vitals

Smashing Magazine

If using 11ty for your static sites, try the 11ty high-performance blog template. Largest Contentful Paint displayed in the WebPageTest filmstrip. This is an empty element — it has no closing tag — requiring a minimum of one attribute to be helpful: src , the source. A handy overview on Cloudinary blog.

Media 145
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Front-End Performance Checklist 2021

Smashing Magazine

web-vitals library can collect and send Core Web Vitals to Google Analytics, Google Tag Manager or any other analytics endpoint. So, if your year-over-year web performance metrics stay stable, that's usually a warning sign as you're actually regressing as the environment keeps improving ( details in a blog post by Gilles Dubuc ).