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Eleventy doesn’t do any special optimizations out of the box to make your sites fast. It doesn’t protect you from making a slow site. But importantly it also doesn’t add anything extra either. This sort of developer empowerment over the final product has seemed to attract an amazing group of performance oriented developers using the project and I am so grateful to every one of you.
About https://techhub.social/@cloudcannon/112604279395366912
Alex […] shares how using CloudCannon for client sites boosts performance and efficiency 🚀
I love #CloudCannon's efficiency. 👍
But with an SSG, #WebPerf depends on the way you build pages. Good SSGs — as #Eleventy — don't force anything so performance is really just the result of developer's work.
The CMS should have no impact. 🤷♂️
If you use #Eleventy and know how to add fetchpriority="high" on your Largest Contenful Paint image, I made a plugin that adds a <link rel="preload"…> for it, even it it's responsive: https://github.com/nhoizey/eleventy-plugin-auto-preload
Feedback welcome! 🙏
Without any visual change, a simple config change in my #Eleventy plugin images-responsiver improved srcset and sizes attributes of images on my photography site and have reduced the homepage weight by half! 🏎
Carolina Gilabert
Rebuilding my site - Part 1: Eleventy
Carol shares the process to build her new site with Eleventy, with a section about image optimisation, a topic I'm very interested in, as you should…
Eleventy: Building an Image Gallery with CSS Grid and PhotoSwipe
Mark is using my Images Responsiver plugin for Eleventy with Netlify Large Media and PhotoSwipe to build an image gallery, and it's really great!
Zach Leatherman 
Mark Llobrera