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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
5
REVIEW
3
PASS
7
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
53
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

11.43 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

17.96 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

0 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.098

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

11.43 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.

18.22 s

Page Load Progression

611 ms
1.2 s
1.8 s
2.4 s
3.1 s
3.7 s
4.3 s
4.9 s
Checks
17
7 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
2.9 MB transferred, 104 requests
FIX
2.9 MB transferred, 104 requests
Warning::
Page weighs 6.4 MB (2.9 MB transferred)
Warning::
Images are 1.3 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.3 MB
Info::
Fonts are 1.0 MB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 1.0 MB
Info::
CSS is 229 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 229 KB
Warning::
104 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.62 g CO2 per page load
2.9 MB / 2.4 MB budget
2.9 MB transferred
104 requests
0.62 g CO2 per page load
Images 1.3 MiB 43%
Fonts 1.0 MiB 35%
JavaScript 396.8 KiB 13%
CSS 228.8 KiB 8%
Other 33.1 KiB 1%
HTML 13.2 KiB 0%
Other 948 B 0%
Other 505 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (2.9 MiB of 2.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
4953ms total JS execution
FIX
4953ms total JS execution
Warning::
https://www.ucc.ie/en/: 1922ms CPU time
Warning::
https://consent.cookiebot.com/uc.js: 1090ms CPU time
Warning::
Unattributable: 902ms CPU time
Warning::
https://consent.cookiebot.com/e1816734-4c65-403b-a...: 612ms CPU time
Info::
https://www.ucc.ie/en/media/2017siteassets/css/mai...: 192ms CPU time
Warning::
Third-party scripts: 4953ms (100% of total)

Main Thread Breakdown

Other 35% Script Evaluation 26% Style & Layout 19% Parse HTML & CSS 10% Rendering 6% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://www.ucc.ie/en/1922ms8ms2ms3rd
https://consent.cookiebot.com/uc.js1090ms806ms20ms3rd
Unattributable902ms10ms0ms3rd
https://consent.cookiebot.com/e1816734-4c65-403b-ac1f-4d57f0846044/cc.js?renew=false&referer=www.ucc.ie&dnt=false&init=false612ms255ms48ms3rd
https://www.ucc.ie/en/media/2017siteassets/css/main.min.css?_cb=337.0192ms0ms0ms3rd
https://www.ucc.ie/en/media/2017siteassets/contentfiles/js/main.min.js?_cb=221.096ms60ms33ms3rd
https://code.jquery.com/jquery-1.12.4.min.js89ms65ms21ms3rd
https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7.1/leaflet.js50ms32ms17ms3rd
D
Page Weight Inventory
Action
104 resources · 2.9 MB · 236 KB savings available
FIX
104 resources · 2.9 MB · 236 KB savings available
Warning::
Page weight 1.9 MB over 1MB target
Got: 2.9 MB Expected: ≤ 1 MB
Info::
~236 KB of savings available
Warning::
103 third-party resources (100% of weight)
Info::
6 resources over 200KB
104 resources · 2.9 MiB · 103 third-party 1.9 MiB over 1MB target
Image 44% · 1.3 MiB
Font 35% · 1.0 MiB
JavaScript 13% · 396.8 KiB
CSS 8% · 228.8 KiB
Document 0% · 13.5 KiB
Other 0% · 1.4 KiB

~235.9 KiB of savings available

Remove unused JavaScript: 235.9 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
38 images, 0 KB saveable
REVIEW
38 images, 0 KB saveable
Warning::
https://www.ucc.ie/en/media/design-2017/icons/ucci... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ucc.ie/en/media/design-2017/icons/ucci... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ucc.ie/en/media/design-2017/imagebanne... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ucc.ie/en/media/homepage/PureBannerMob... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ucc.ie/en/media/design-2017/icons/ucci... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ucc.ie/en/media/design-2017/icons/ucci... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
38 images 1.3 MB
0 oversized -0 KB
19 legacy format
6 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
JS Bundles
Action
34 scripts, 236 KB unused
REVIEW
34 scripts, 236 KB unused
Warning::
https://www.ucc.ie/en/media/2017siteassets/content...: 51 KB unused (79%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.ucc.ie/en/media/2017siteassets/content...: 51 KB unused (79%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7...: 29 KB unused (84%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7...: 29 KB unused (84%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://consent.cookiebot.com/e1816734-4c65-403b-a...: 26 KB unused (23%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 236 KB
236 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.ucc.ie/en/media/2017siteassets/contentfiles/js/main.min.js?_cb=221.00 KB51 KB (79%)✓3rd
https://www.ucc.ie/en/media/2017siteassets/contentfiles/js/main.min.js?_cb=221.064 KB51 KB (79%)✓3rd
https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7.1/leaflet.js0 KB29 KB (84%)✓3rd
https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7.1/leaflet.js35 KB29 KB (84%)✓3rd
https://consent.cookiebot.com/e1816734-4c65-403b-ac1f-4d57f0846044/cc.js?renew=false&referer=www.ucc.ie&dnt=false&init=false112 KB26 KB (23%)✓3rd
https://cdn.datatables.net/v/dt/dt-1.10.16/r-2.2.0/datatables.min.js30 KB25 KB (85%)✓3rd
https://cdn.datatables.net/v/dt/dt-1.10.16/r-2.2.0/datatables.min.js0 KB25 KB (85%)✓3rd
https://cdn.jsdelivr.net/algoliasearch/3/algoliasearch.min.js19 KB—✓3rd
https://cdnjs.cloudflare.com/ajax/libs/remodal/1.1.1/remodal.min.js0 KB—✓3rd
https://cdnjs.cloudflare.com/ajax/libs/magnific-popup.js/1.1.0/jquery.magnific-popup.min.js7 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
6 fonts (1038 KB)
PASS
6 fonts (1038 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

1038 KB total

Render-blocking

0

of 6

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s FCP 11.4 s LCP 18.0 shttps://fonts.gstatic.com/s/merriweather/v33/u-4t0qyriQwlOrhSvowK_l5UcA6ht3ZEqezpPbXEE55RlL_FB7E.woff2u-4t0qyriQwlOrhSvowK_l5... https://fonts.gstatic.com/s/merriweather/v33/u-4t0qyriQwlOrhSvowK_l5UcA6ht3ZEqezpPbXEE55RlL_FB7E.woff2 — 178.2 KiB — 31 ms — font-display: swaphttps://cdn.jsdelivr.net/fontsource/fonts/firago@latest/latin-300-normal.woff2latin-300-normal.woff2 https://cdn.jsdelivr.net/fontsource/fonts/firago@latest/latin-300-normal.woff2 — 249.7 KiB — 47 ms — font-display: swaphttps://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/fonts/fontawesome-webfont.woff2?v=4.7.0fontawesome-webfont.woff2 https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/fonts/fontawesome-webfont.woff2?v=4.7.0 — 76.0 KiB — 28 ms — font-display: swaphttps://cdn.jsdelivr.net/fontsource/fonts/firago@latest/latin-600-normal.woff2latin-600-normal.woff2 https://cdn.jsdelivr.net/fontsource/fonts/firago@latest/latin-600-normal.woff2 — 252.4 KiB — 52 ms — font-display: swaphttps://cdn.jsdelivr.net/fontsource/fonts/firago@latest/latin-400-normal.woff2latin-400-normal.woff2 https://cdn.jsdelivr.net/fontsource/fonts/firago@latest/latin-400-normal.woff2 — 245.3 KiB — 35 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 36.7 KiB — 6 ms — font-display: swap
u-4t0qyriQwlOrhSvowK_l5... woff2 swap
Size 178 KB
Load time 31 ms
Start 2.4 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
latin-300-normal.woff2 woff2 swap
Size 250 KB
Load time 47 ms
Start 2.4 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
fontawesome-webfont.woff2 unknown swap
Size 76 KB
Load time 28 ms
Start 2.4 s
Risk FOUT — text flashes from fallback to web font
latin-600-normal.woff2 woff2 swap
Size 252 KB
Load time 52 ms
Start 2.4 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
latin-400-normal.woff2 woff2 swap
Size 245 KB
Load time 35 ms
Start 2.4 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 37 KB
Load time 6 ms
Start 4.3 s
Risk FOUT — text flashes from fallback to web font
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)

Fixing the unchecked items could save ~486 KB and ~972 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
104 requests over 4395ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s FCP 11.4 s LCP 18.0 shttps://ucc.ie// https://ucc.ie/ — 301 — 98 B — 875 ms — h2https://www.ucc.ie/www.ucc.ie/ https://www.ucc.ie/ — 301 — 213 B — 370 ms — h2https://www.ucc.ie/en/www.ucc.ie/en/ https://www.ucc.ie/en/ — 200 — 12.4 KiB — 174 ms — h2https://consent.cookiebot.com/uc.jsconsent.cookiebot.com/uc.js https://consent.cookiebot.com/uc.js — 200 — 27.0 KiB — 71 ms — h2https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7.1/leaflet.csscdnjs.cloudflare.com/ajax/libs/leaf... https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7.1/leaflet.css — 200 — 3.4 KiB — 29 ms — h3https://www.ucc.ie/en/media/2017siteassets/css/main.min.css?_cb=337.0www.ucc.ie/en/media/2017siteassets/... https://www.ucc.ie/en/media/2017siteassets/css/main.min.css?_cb=337.0 — 200 — 203.3 KiB — 685 ms — h2https://www.ucc.ie/en/media/2017siteassets/images/ucc-central-header-logo.svgwww.ucc.ie/en/media/2017siteassets/... https://www.ucc.ie/en/media/2017siteassets/images/ucc-central-header-logo.svg — 200 — 59.5 KiB — 683 ms — h2https://www.ucc.ie/en/media/homepage/PureBannerMobile.webpwww.ucc.ie/en/media/homepage/PureBa... https://www.ucc.ie/en/media/homepage/PureBannerMobile.webp — 200 — 77.8 KiB — 509 ms — h2https://consentcdn.cookiebot.com/consentconfig/e1816734-4c65-403b-ac1f-4d57f0846044/settings.jsonconsentcdn.cookiebot.com/consentcon... https://consentcdn.cookiebot.com/consentconfig/e1816734-4c65-403b-ac1f-4d57f0846044/settings.json — 200 — 948 B — 27 ms — h2https://www.ucc.ie/en/media/design-2017/imagebanner2022/northwingoghammobile.webpwww.ucc.ie/en/media/design-2017/ima... https://www.ucc.ie/en/media/design-2017/imagebanner2022/northwingoghammobile.webp — 200 — 123.6 KiB — 753 ms — h2https://www.ucc.ie/en/media/design-2017/icons/uccicons/ucc-icon-books-yellow.svgwww.ucc.ie/en/media/design-2017/ico... https://www.ucc.ie/en/media/design-2017/icons/uccicons/ucc-icon-books-yellow.svg — 200 — 1.5 KiB — 749 ms — h2https://www.ucc.ie/en/media/design-2017/icons/uccicons/ucc-icon-search-look-blue.svgwww.ucc.ie/en/media/design-2017/ico... https://www.ucc.ie/en/media/design-2017/icons/uccicons/ucc-icon-search-look-blue.svg — 200 — 1.1 KiB — 750 ms — h2https://code.jquery.com/jquery-1.12.4.min.jscode.jquery.com/jquery-1.12.4.min.j... https://code.jquery.com/jquery-1.12.4.min.js — 200 — 33.3 KiB — 61 ms — h2https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.jscdnjs.cloudflare.com/ajax/libs/twit... https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js — 200 — 9.1 KiB — 46 ms — h3https://cdn.jsdelivr.net/npm/slick-carousel@1.8.1/slick/slick.min.jscdn.jsdelivr.net/npm/slick-carousel... https://cdn.jsdelivr.net/npm/slick-carousel@1.8.1/slick/slick.min.js — 200 — 11.1 KiB — 54 ms — h2https://cdnjs.cloudflare.com/ajax/libs/remodal/1.1.1/remodal.min.jscdnjs.cloudflare.com/ajax/libs/remo... https://cdnjs.cloudflare.com/ajax/libs/remodal/1.1.1/remodal.min.js — 200 — 2.9 KiB — 25 ms — h3https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.12.2/js/bootstrap-select.min.jscdnjs.cloudflare.com/ajax/libs/boot... https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.12.2/js/bootstrap-select.min.js — 200 — 9.3 KiB — 42 ms — h3https://cdnjs.cloudflare.com/ajax/libs/headroom/0.9.3/headroom.min.jscdnjs.cloudflare.com/ajax/libs/head... https://cdnjs.cloudflare.com/ajax/libs/headroom/0.9.3/headroom.min.js — 200 — 2.1 KiB — 43 ms — h3https://cdnjs.cloudflare.com/ajax/libs/magnific-popup.js/1.1.0/jquery.magnific-popup.min.jscdnjs.cloudflare.com/ajax/libs/magn... https://cdnjs.cloudflare.com/ajax/libs/magnific-popup.js/1.1.0/jquery.magnific-popup.min.js — 200 — 7.0 KiB — 43 ms — h3https://cdn.jsdelivr.net/algoliasearch/3/algoliasearch.min.jscdn.jsdelivr.net/algoliasearch/3/al... https://cdn.jsdelivr.net/algoliasearch/3/algoliasearch.min.js — 200 — 19.0 KiB — 52 ms — h2https://cdn.datatables.net/v/dt/dt-1.10.16/r-2.2.0/datatables.min.jscdn.datatables.net/v/dt/dt-1.10.16/... https://cdn.datatables.net/v/dt/dt-1.10.16/r-2.2.0/datatables.min.js — 200 — 30.3 KiB — 58 ms — h2https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7.1/leaflet.jscdnjs.cloudflare.com/ajax/libs/leaf... https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7.1/leaflet.js — 200 — 35.5 KiB — 50 ms — h3https://consentcdn.cookiebot.com/consentconfig/e1816734-4c65-403b-ac1f-4d57f0846044/ucc.ie/configuration.jsconsentcdn.cookiebot.com/consentcon... https://consentcdn.cookiebot.com/consentconfig/e1816734-4c65-403b-ac1f-4d57f0846044/ucc.ie/configuration.js — 200 — 1.7 KiB — 16 ms — h2https://consent.cookiebot.com/e1816734-4c65-403b-ac1f-4d57f0846044/cc.js?renew=false&referer=www.ucc.ie&dnt=false&init=falseconsent.cookiebot.com/e1816734-4c65... https://consent.cookiebot.com/e1816734-4c65-403b-ac1f-4d57f0846044/cc.js?renew=false&referer=www.ucc.ie&dnt=false&init=false — 200 — 111.9 KiB — 381 ms — 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https://www.ucc.ie/en/media/2017siteassets/favicon/favicon-16x16.png — 200 — 15.6 KiB — 175 ms — h2https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.jscdnjs.cloudflare.com/ajax/libs/twit... https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js — 200 — 0 B — 2 ms — h3https://cdn.jsdelivr.net/npm/slick-carousel@1.8.1/slick/slick.min.jscdn.jsdelivr.net/npm/slick-carousel... https://cdn.jsdelivr.net/npm/slick-carousel@1.8.1/slick/slick.min.js — 200 — 0 B — 5 ms — h2https://cdnjs.cloudflare.com/ajax/libs/remodal/1.1.1/remodal.min.jscdnjs.cloudflare.com/ajax/libs/remo... https://cdnjs.cloudflare.com/ajax/libs/remodal/1.1.1/remodal.min.js — 200 — 0 B — 3 ms — h3https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.12.2/js/bootstrap-select.min.jscdnjs.cloudflare.com/ajax/libs/boot... https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.12.2/js/bootstrap-select.min.js — 200 — 0 B — 2 ms — h3https://cdnjs.cloudflare.com/ajax/libs/headroom/0.9.3/headroom.min.jscdnjs.cloudflare.com/ajax/libs/head... https://cdnjs.cloudflare.com/ajax/libs/headroom/0.9.3/headroom.min.js — 200 — 0 B — 2 ms — h3https://cdnjs.cloudflare.com/ajax/libs/magnific-popup.js/1.1.0/jquery.magnific-popup.min.jscdnjs.cloudflare.com/ajax/libs/magn... https://cdnjs.cloudflare.com/ajax/libs/magnific-popup.js/1.1.0/jquery.magnific-popup.min.js — 200 — 0 B — 1 ms — h3https://cdn.jsdelivr.net/algoliasearch/3/algoliasearch.min.jscdn.jsdelivr.net/algoliasearch/3/al... https://cdn.jsdelivr.net/algoliasearch/3/algoliasearch.min.js — 200 — 0 B — 2 ms — h2https://cdn.datatables.net/v/dt/dt-1.10.16/r-2.2.0/datatables.min.jscdn.datatables.net/v/dt/dt-1.10.16/... https://cdn.datatables.net/v/dt/dt-1.10.16/r-2.2.0/datatables.min.js — 200 — 0 B — 2 ms — h2https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7.1/leaflet.jscdnjs.cloudflare.com/ajax/libs/leaf... https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7.1/leaflet.js — 200 — 0 B — 6 ms — h3https://www.ucc.ie/en/media/2017siteassets/contentfiles/js/jquery.mCustomScrollbar.jswww.ucc.ie/en/media/2017siteassets/... https://www.ucc.ie/en/media/2017siteassets/contentfiles/js/jquery.mCustomScrollbar.js — 200 — 0 B — 2 ms — h2https://www.ucc.ie/en/media/2017siteassets/contentfiles/js/jquery.easing.1.3.jswww.ucc.ie/en/media/2017siteassets/... https://www.ucc.ie/en/media/2017siteassets/contentfiles/js/jquery.easing.1.3.js — 200 — 0 B — 1 ms — h2https://www.ucc.ie/en/media/2017siteassets/contentfiles/js/jquery.timeline.jswww.ucc.ie/en/media/2017siteassets/... https://www.ucc.ie/en/media/2017siteassets/contentfiles/js/jquery.timeline.js — 200 — 0 B — 1 ms — h2https://www.ucc.ie/en/media/2017siteassets/contentfiles/js/main.min.js?_cb=221.0www.ucc.ie/en/media/2017siteassets/... https://www.ucc.ie/en/media/2017siteassets/contentfiles/js/main.min.js?_cb=221.0 — 200 — 0 B — 3 ms — 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h3https://cdnjs.cloudflare.com/ajax/libs/lightbox2/2.10.0/js/lightbox.min.jscdnjs.cloudflare.com/ajax/libs/ligh... https://cdnjs.cloudflare.com/ajax/libs/lightbox2/2.10.0/js/lightbox.min.js — 200 — 3.1 KiB — 14 ms — h3https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.6.0/ajax-loader.gifcdnjs.cloudflare.com/ajax/libs/slic... https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.6.0/ajax-loader.gif — 200 — 3.7 KiB — 14 ms — h3https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2fonts.gstatic.com/s/roboto/v51/KFO7... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 200 — 36.7 KiB — 6 ms — h3https://cdnjs.cloudflare.com/ajax/libs/lightbox2/2.10.0/images/prev.pngcdnjs.cloudflare.com/ajax/libs/ligh... https://cdnjs.cloudflare.com/ajax/libs/lightbox2/2.10.0/images/prev.png — 200 — 1.9 KiB — 15 ms — h3https://cdnjs.cloudflare.com/ajax/libs/lightbox2/2.10.0/images/next.pngcdnjs.cloudflare.com/ajax/libs/ligh... https://cdnjs.cloudflare.com/ajax/libs/lightbox2/2.10.0/images/next.png — 200 — 1.9 KiB — 18 ms — h3data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==data:image/gif;base64,R0lGODlhAQABA... data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw== — 200 — 0 B — 0 ms — datahttps://cdnjs.cloudflare.com/ajax/libs/lightbox2/2.10.0/images/loading.gifcdnjs.cloudflare.com/ajax/libs/ligh... https://cdnjs.cloudflare.com/ajax/libs/lightbox2/2.10.0/images/loading.gif — 200 — 8.1 KiB — 14 ms — h3https://cdnjs.cloudflare.com/ajax/libs/lightbox2/2.10.0/images/close.pngcdnjs.cloudflare.com/ajax/libs/ligh... https://cdnjs.cloudflare.com/ajax/libs/lightbox2/2.10.0/images/close.png — 200 — 877 B — 16 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 4953ms · 355KB · €54/mo
www.ucc.ie
Other
Costly
Execution 1922ms
Transfer 12 KB
Monthly Cost €21/mo
consent.cookiebot.com
Other
Costly
Execution 1090ms
Transfer 27 KB
Monthly Cost €12/mo
Unattributable
Other
Costly
Execution 902ms
Transfer 0 KB
Monthly Cost €10/mo
consent.cookiebot.com
Other
Costly
Execution 612ms
Transfer 112 KB
Unused 23%
Monthly Cost €7/mo
www.ucc.ie
Other
Optional
Execution 192ms
Transfer 203 KB
Monthly Cost €2/mo
www.ucc.ie
Other
Optional
Execution 96ms
Transfer 0 KB
Unused 79%
Monthly Cost €1/mo
code.jquery.com
Other
Optional
Execution 89ms
Transfer 0 KB
Monthly Cost €1/mo
cdnjs
CDN
Optional
Execution 50ms
Transfer 0 KB
Unused 84%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.ucc.ie adds 1922ms and costs ~€21/month
  • consent.cookiebot.com adds 1090ms and costs ~€12/month
  • Unattributable adds 902ms and costs ~€10/month
  • consent.cookiebot.com adds 612ms and costs ~€7/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

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

www.ucc.ie takes 1922ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

consent.cookiebot.com takes 1090ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 902ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

consent.cookiebot.com takes 612ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

79% of www.ucc.ie's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

84% of cdnjs's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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