Performance
· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
3.06 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
6.80 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
601 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
4.49 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
13.69 s
Page Load Progression
FPage Weight BudgetAction2.7 MB transferred, 75 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction3461ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 1204ms | 452ms | 0ms | 3rd |
| https://www.irishexaminer.com/ | 681ms | 55ms | 21ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202601.1.0/otBannerSdk.js | 507ms | 349ms | 65ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KHHXC44 | 356ms | 270ms | 65ms | 3rd |
| https://irishtimes-cdn.relevant-digital.com/static/tags/67288b319eada4c11b7afe41.js | 260ms | 208ms | 49ms | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 231ms | 120ms | 111ms | 3rd |
| https://www.irishexaminer.com/pu_examiner/scripts/init_swiper.min.js?v=1.01 | 97ms | 52ms | 0ms | 3rd |
| https://www.irishexaminer.com/pu_examiner/scripts/swiper/swiper.min.js?v=1.01 | 65ms | 22ms | 33ms | 3rd |
| https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js | 60ms | 45ms | 11ms | 3rd |
FJS BundlesAction20 scripts, 501 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 242 KB (67%) | ✓ | 3rd |
| https://irishtimes-cdn.relevant-digital.com/static/tags/67288b319eada4c11b7afe41.js | 135 KB | 99 KB (74%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KHHXC44 | 167 KB | 81 KB (49%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202601.1.0/otBannerSdk.js | 127 KB | 59 KB (47%) | ✓ | 3rd |
| https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js | 31 KB | 20 KB (68%) | ✓ | 3rd |
| https://www.irishexaminer.com/pu_examiner/scripts/bootstrap.bundle.min.js | 23 KB | — | ✓ | 3rd |
| https://www.irishexaminer.com/pu_examiner/scripts/initPodcast.min.js?v=0.25 | 4 KB | — | ✓ | 3rd |
| https://www.irishexaminer.com/pu_examiner/scripts/scripts_IE11.min.js | 1 KB | — | ✓ | 3rd |
| https://cdn.cookielaw.org/consent/tcf.stub.js | 1 KB | — | ✓ | 3rd |
| https://www.irishexaminer.com/cms_minify/102/javascript/javascript_1776775628.js | 3 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
FPage Weight InventoryAction75 resources · 2.7 MB · 501 KB savings availableFIX
~501.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 75 resources | 2.7 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction29 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Performance issues directly impact user engagement and conversion rates.
A+Text CompressionAll text resources are compressedPASS
A+Font Loading8 fonts (169 KB)PASS
Web fonts
8
169 KB total
Render-blocking
0
of 8
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
Optimization checklist
- Preload critical fonts (priority=high)
- Use woff2 format for all fonts
- Set font-display to swap, optional, or fallback
- Subset large fonts (≤100 KB each)
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints10 hints, 0 missing preconnectsPASS
Current Resource Hints
10 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall75 requests over 1422msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 1204ms | 0 KB | — | €19/mo | Costly |
www.irishexaminer.com www.irishexaminer.com | Other | 681ms | 30 KB | — | €11/mo | Costly |
OneTrust cdn.cookielaw.org | Consent | 507ms | 127 KB | 47% | €8/mo | Essential |
Google Tag Manager www.googletagmanager.com | Tag Manager | 356ms | 167 KB | 49% | €6/mo | Costly |
irishtimes-cdn.relevant-digital.com irishtimes-cdn.relevant-digital.com | Other | 260ms | 135 KB | 74% | €4/mo | Costly |
www.gstatic.com www.gstatic.com | Other | 231ms | 362 KB | 67% | €4/mo | Costly |
www.irishexaminer.com www.irishexaminer.com | Other | 97ms | 1 KB | — | €2/mo | Optional |
www.irishexaminer.com www.irishexaminer.com | Other | 65ms | 35 KB | — | €1/mo | Optional |
ajax.googleapis.com ajax.googleapis.com | Other | 60ms | 31 KB | 68% | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 1204ms and costs ~€19/month
- www.irishexaminer.com adds 681ms and costs ~€11/month
- Google Tag Manager adds 356ms and costs ~€6/month
- irishtimes-cdn.relevant-digital.com adds 260ms and costs ~€4/month
- www.gstatic.com adds 231ms and costs ~€4/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.
Learn more ▾ ▴
Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.
Source: web.dev
Unattributable takes 1204ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.irishexaminer.com takes 681ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 356ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
irishtimes-cdn.relevant-digital.com takes 260ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
74% of irishtimes-cdn.relevant-digital.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
www.gstatic.com takes 231ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
67% of www.gstatic.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
68% of ajax.googleapis.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev