A WordPress Hero Image Is Delaying Largest Contentful Paint
A WordPress hero image is reported as the Largest Contentful Paint element. Diagnose discovery, dimensions, format and priority before compressing it again.
SPECIALIST DIAGNOSTIC GUIDES
Measure the bottleneck.
Optimise the right layer.
Performance guides for Core Web Vitals, TTFB, render blocking, JavaScript, images, fonts, caching and transactional journeys.
START WITH THE VISIBLE SYMPTOM
Guidance organised around real incidents.
Choose the symptom closest to what you see, collect the evidence and follow a controlled route to verification.
01
Slow Largest Contentful Paint
Separate server delay, image delivery, fonts, CSS and rendering on the actual page template.
Explore the guides 02Poor Interaction to Next Paint
Find the JavaScript, third party or long task blocking real user interactions.
Explore the guides 03Layout shifts
Measure unstable images, fonts, embeds and late interface changes instead of hiding the score.
Explore the guides 04Slow server response
Trace edge, runtime, database, cache and upstream calls that delay the first byte.
Explore the guides 05Heavy third-party scripts
Quantify each tag, app and embed before delaying or removing it from the critical journey.
Explore the guides 06Lab and field data disagree
Compare device, route, geography, cache and user state before choosing an optimisation.
Explore the guidesRead the guide ↗
A Single WordPress Page Is Much Slower Than the Rest of the Site
One WordPress page is slow while the rest of the site is fast. Isolate its template, queries, media, embeds and cache behaviour before changing the whole site.
WordPress Is Slow at Certain Times of Day: How to Find the Shared Bottleneck
WordPress becomes slow on a schedule. Correlate traffic, cron, backups, email, PHP workers and MySQL activity without guessing from one snapshot.
PageSpeed Scores Change Between Tests: Which Result Should You Trust?
PageSpeed results change from run to run. Learn which variations matter, how to compare medians and when field data outweighs a single laboratory score.
How to Build a Reproducible WordPress Performance Test Before Optimising
Create a repeatable WordPress performance baseline before changing cache, images or code. Define URLs, states, metrics, evidence and acceptance criteria.
Why a WordPress Site Is Fast for You but Slow for Real Visitors
Your WordPress site feels fast on your computer but customers report delays. Learn how cache, location, devices and real-user data reveal the difference.
PageSpeed Insights Says “Passed” but the Site Still Feels Slow: What to Measure Next
A passing PageSpeed result does not explain every delay. Learn how to test WordPress navigation, forms, checkout and real interactions beyond the score.
WordPress Is Slow Only on Mobile Data: A Practical Diagnostic Sequence
WordPress works on Wi-Fi but feels slow on mobile data. Diagnose image weight, fonts, scripts, latency and server response in the right order.
A WordPress Page Is Slow on the First Visit but Fast After Refresh
A WordPress page is slow the first time and fast on refresh. Separate browser cache, page cache, CDN and origin generation before changing settings.
Why Logged-In WordPress Users See a Slower Site Than Visitors
WordPress is fast for visitors but slow after login. Diagnose cache bypass, admin-bar assets, user queries, WooCommerce sessions and plugin behaviour.
WordPress Performance Dropped After an Update: How to Compare Before and After
WordPress became slower after updating core, a plugin or theme. Compare requests, queries and assets before rolling back or changing performance settings.