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Images too wide for any phone, with the WordPress logo, xSpeed cover
ImagesWebP

A Third of WordPress Images Are Too Wide for Any Phone in 2026, and They Carry 73% of the Bytes

We fetched 3,870 images from 368 WordPress homepages twice, with two different Accept headers. Format adoption is 42% or 28% depending on what you ask for.

Oct 3, 2026 18 min read
Fast for you, slow abroad, xSpeed cover
CDNPerformance

Fast for You, Slow Abroad: It Depends Who Answers Your First Byte

Your page is quick from your desk and slow from another continent. Find out whether an edge near your visitor or your own origin answered, then fix that half.

Oct 2, 2026 7 min read
The font arrives late and the text jumps, xSpeed cover
PerformanceCore Web Vitals

The Font Arrives Late and the Text Jumps: Swap Does That by Design

Turning on font optimization trades invisible text for shifted text, by specification. Two variables tell you which symptom you have, and the fix differs for each.

Oct 2, 2026 7 min read
Cache exclusions that match what you mean, with the WordPress logo, xSpeed cover
CachingExclusions

WordPress Cache Exclusions in 2026: Adding an Asterisk Makes the Rule Match Less

Cache exclusions fail quietly. The four fields match differently, an asterisk narrows a rule, and the query field is an allow-list that runs first.

Oct 2, 2026 10 min read
WP Rocket vs SiteGround Optimizer, with the WP Rocket and SiteGround Optimizer logos, xSpeed cover
WP RocketSiteGround Optimizer

WP Rocket vs SiteGround Optimizer in 2026: One Checks Your Filesystem, the Other Checks Its Licence Server

Speed Optimizer locks three features to SiteGround's filesystem with two file checks. WP Rocket needs a valid licence and its own cloud. Audited from shipped source.

Oct 2, 2026 20 min read
The 260ms nobody caches, with the WordPress logo, xSpeed cover
TTFBRedirects

The 260ms Nobody Caches: 88% of WordPress Sites Redirect an http Visitor Before Serving a Byte in 2026

1,000 WordPress sites probed on 2 October 2026. Arrive on http and 88.8% send you somewhere else first, at a median 260ms the page cache never touches.

Oct 2, 2026 17 min read
Enable browser caching the right way, with the WordPress logo, xSpeed cover
Browser CacheCaching

Enabling Browser Caching in WordPress in 2026: Send Nothing and the Browser Guesses 10%

WordPress sets no Cache-Control on an ordinary page view, so the browser invents a lifetime. The Apache and nginx rules that replace the guess, and how to confirm them.

Oct 2, 2026 9 min read
The cache folder keeps growing, with the WordPress logo, xSpeed cover
CachingPerformance

The Cache Folder Keeps Growing: Expiring a Page and Deleting It Are Two Different Jobs

A cache entry that expired is still on disk. Expiry is checked when a page is served; deletion is a separate scheduled sweep, and four things stop it running.

Oct 1, 2026 6 min read
Homepage not updating after you publish, with the WordPress logo, xSpeed cover
CachingPerformance

The Post Changed and the Homepage Did Not: Auto-Purge Only Clears the Pages You Ticked

The post URL is fresh and the homepage, category and feed still show the old version. Auto-purge clears a list you configure, and listing pages are usually left off it.

Oct 1, 2026 7 min read
FlyingPress vs LiteSpeed Cache, with the FlyingPress and LiteSpeed logos, xSpeed cover
FlyingPressLiteSpeed Cache

FlyingPress vs LiteSpeed Cache in 2026: The Free Plugin Is a Bridge to a Cache Engine You May Not Own

LiteSpeed Cache lists 40 features and 16 of them need a LiteSpeed server. On Nginx the page cache lives at QUIC.cloud, and its free credit is sized by your host.

Sep 30, 2026 21 min read
Mobile vs desktop: the gap that misleads, xSpeed cover
Core Web VitalsMobile

The Smallest Score Gap Was the Worst News: Triaging 1,110 WordPress Speed Reports Graded on Two Devices in 2026

1,110 WordPress pages graded on desktop and mobile on 30 September 2026. The letter grade differed on 61.6%, and 8 of 19 checks never moved at all.

Sep 30, 2026 14 min read
PageSpeed says not cached, with the Lighthouse logo, xSpeed cover
CachingPerformance

PageSpeed Says the Page Is Not Cached: Its Audit Only Reads Fonts, Images and Scripts

Google's cache audit grades fonts, images, media, scripts and style sheets. An HTML page is not on that list, so it never inspected your page cache.

Sep 29, 2026 6 min read

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