How to optimize Cumulative Layout Shift (CLS) on Shopify sites
The common causes for CLS on Shopify sites and how to fix them
Published on Performance at Shopify
Posts tagged “WebPerf”
Learn about web performance, web development, and Eleventy.
Debugging common causes for slow loading in Shopify Liquid storefronts
Have you ever been confronted with the daunting task of figuring out what exactly is causing a page to load slowly?
Published on Performance at Shopify
Liquid vs headless: A look at real user web performance
Considering headless? Why web performance should not be your only reason...
Published on Performance at Shopify
Announcing new Liquid features for better web performance
Default lazy loading for image tags and new section.index properties...
Published on Performance at Shopify
How layout position impacts three big web performance levers
We see three common web performance problems related to layout position with Shopify themes...
Published on Performance at Shopify
Announcing INP as the next Core Web Vital: What Shopify stores can do now
What does this mean for Shopify sites and what can you do now to make sure you’re ready for the switch?
Published on Performance at Shopify
3 ways to find your worst JavaScript offenders for page load
Before debugging FID and INP directly, look for low-hanging JavaScript fruit to trim out.
Published on Performance at Shopify
Using WebPageTest on Shopify preview sites with passwords
WebPageTest is an amazing tool for testing performance. Here's how to use the scripting feature to test sites behind passwords.
Published on Performance at Shopify
Why web performance still matters in 2023
Does web performance truly matter? What are the reasons? Whether you're new to this topic or want to better understand the arguments, this article is for you.
Published on Performance at Shopify
A countdown of my top 5 favorite web performance tools
Much like a carpenter or handyperson, every web performance expert has a set of their favorite tools. Here’s my own toolbox favorites and why.
Published on Planet Performance
Optimizing images for performance on Shopify
Images are key to user experience. Making images smaller doesn't always result in better performance. How can images impact page load speed and layout shift?
Published on Performance at Shopify
Responsive images on Shopify with Liquid
Responsive images are important for both user experience and site speed. Get them right, and your users will be more likely to convert. Get them wrong, and you may cause your site to be slow.
Published on Performance at Shopify
Lazy load images for performance
Lazy loading is a performance strategy that de-prioritizes assets like images that are not needed immediately after a webpage is loaded. As with any strategy, you can misuse it causing worse performance.
Published on Performance at Shopify
Fix web performance for the long-term
At Shopify, we’ve seen what works and what doesn’t work when companies want to improve their web performance. We want to share with you our top learnings to get you on the path of success.
Published on Performance at Shopify
Web Almanac 2021: Performance
The state of web performance in 2021 including the Core Web Vitals (LCP, CLS, FID) as well as FCP and TTFB for the top ~8M websites.
Published on Web Almanac by HTTP Archive
An Informal Survey of Web Performance Tooling in 2021
What tools are web performance engineers using to measure site speed in 2021? Learn which are the most used tools as well as some new tools to try out.
Explore JavaScript Dependencies With Lighthouse Treemap
Discover all JavaScript downloaded and used/unused for a site in a handy data visualization with Lighthouse Treemap.
What to know about AVIF on Cloudinary
Start using AVIF today with Cloudinary. Learn about your options, the tradeoffs, and how to overcome slow transformations.
#30DaysOfWebPerf: The Pros and Cons of a Twitter series
My experiment with 30 days of web performance tips. All packaged up for your temporary viewing pleasure. Results from a Twitter series by Sia Karamalegos.
How to Eliminate Render-Blocking Resources: a Deep Dive
Is Lighthouse telling you to eliminate render-blocking resources? Learn what this means, why it's important, and how to fix it in your HTML, CSS, and JavaScript.
Faster YouTube embeds in Eleventy
Use lite-youtube-embed in Eleventy for faster and more privacy-minded video
Optimize Images in Eleventy Using Cloudinary
Learn the fundamentals behind responsive images and how to set them up in Eleventy using Cloudinary and Eleventy shortcodes
Vintage Bundles talk at Magnolia JS
What are some strategies for serving modern JavaScript to modern browsers?
Responsive, Performant Images for the Web
Learn to optimize your images for the web in this video from PerfMatters Conf.
Justifying performance improvements using Google Analytics
Trying to convince your company to make site load speed improvements? Maybe Google Analytics can help.
Making Google Fonts Faster in 2022
If you use Google Fonts, a few additional steps can lead to much faster load times. Learn about preconnect, optimal placement, font display, preload, and more in this post.
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