Page builders and web performance: Elementor, Divi and the cost of the DOM
Visual builders make page creation easier but produce a large, deep DOM: why it happens, how it weighs on INP, LCP and CLS and what you can do…
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CATEGORY
Optimization
Server and application work.
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Unused CSS and dynamic states
Automatic removal of unused CSS takes a snapshot of the page in a single state: open menus, forms with errors and carts end up unstyled. Why it happens…
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Early Hints (HTTP 103): announcing critical resources while the server is thinking
With the 103 code the server or CDN tells the browser which resources to download while the page is still being prepared: how it works, when it pays…
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TTFB and page caching
The first byte sets the headroom for every other metric: how Full Page Cache, with Varnish at the forefront, brings TTFB from over a second down to a…
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Lazy loading done right: when to defer images and when it is a mistake
Deferred loading reduces transferred data, but on the wrong image it worsens LCP: how loading=”lazy” works, which images to defer, how WordPress behaves and how to check it.
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Core Web Vitals for WooCommerce: where conversions are lost
Categories, product page, cart and checkout: where a WooCommerce store loses speed along the purchase journey, why users with a full cart browse without a cache, and where…
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Back/forward cache: why your site’s Back button is slow
The back/forward cache makes going back to the previous page instant, but many sites are excluded from it without knowing: how it works, what blocks it and how…
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Speculation Rules and prerendering: pages that open in zero seconds
With prefetch and prerender the browser loads the next page before the click: how Speculation Rules work, how to choose the eagerness and how to handle analytics, server…
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Third-party scripts: the hidden cost of tags, pixels and widgets for Core Web Vitals
Analytics, pixels, chat, reviews and A/B tests often weigh on Core Web Vitals more than the site’s own code: how to measure their cost and how to govern…
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THE NEXT STEP
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